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Vo T, Tran T, Ho T, Le C, Pham H, Tran H, Ho N, Cao T, Vo B. Clinical evaluation of hysterectomy for the treatment of invasive mole in Southern Vietnam. Eur Rev Med Pharmacol Sci 2023; 27:7720-7727. [PMID: 37667950 DOI: 10.26355/eurrev_202308_33426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
OBJECTIVE This study aimed to determine the rate of salvage chemotherapy and review associated factors in invasive mole patients treated by primary or delayed hysterectomy. PATIENTS AND METHODS This study was carried out at the Tu Du Hospital, where a total of 189 patients were diagnosed with invasive mole based on histologic examination by hysterectomy between 01/2016 to 12/2020. We used the life table method to estimate the cumulative rate. We applied the Cox proportional hazard model to determine the factors associated with the need for salvage chemotherapy. RESULTS At 12-month follow-up, 47 patients had required salvage chemotherapy. The incidence was 24.87% (95% CI: 18.88-31.66). Applying the multivariate model, prophylactic chemotherapy (HR = 2.75, 95% Cl: 1.20-6.30) and two weeks postoperative hCG value greater than 1,900 mIU/mL (HR = 4.30, 95% Cl: 2.08-8.87) increased the risk of requiring salvage chemotherapy. Postoperative chemotherapy decreased the risk of requiring salvage chemotherapy (HR = 0.43, 95% Cl: 0.22-0.83). CONCLUSIONS Hysterectomy can be considered safe and effective in treating invasive mole patients. Although patients were treated by hysterectomy, 24.87% of patients needed salvage chemotherapy to achieve remission. This study affirms the malignant nature of invasive mole, a subtype of gestational trophoblastic neoplasia (GTN). It is not purely a local invasion of molar villi. Postoperative chemotherapy plays an essential role in reducing the risk of requiring salvage chemotherapy.
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Affiliation(s)
- T Vo
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam.
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Lui G, Leung HS, Lee J, Wong CK, Li X, Ho M, Wong V, Li T, Ho T, Chan YY, Lee SS, Lee APW, Wong KT, Zee B. An efficient approach to estimate the risk of coronary artery disease for people living with HIV using machine-learning-based retinal image analysis. PLoS One 2023; 18:e0281701. [PMID: 36827291 PMCID: PMC9955663 DOI: 10.1371/journal.pone.0281701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 01/30/2023] [Indexed: 02/25/2023] Open
Abstract
BACKGROUND People living with HIV (PLWH) have increased risks of non-communicable diseases, especially cardiovascular diseases. Current HIV clinical management guidelines recommend regular cardiovascular risk screening, but the risk equation models are not specific for PLWH. Better tools are needed to assess cardiovascular risk among PLWH accurately. METHODS We performed a prospective study to determine the performance of automatic retinal image analysis in assessing coronary artery disease (CAD) in PLWH. We enrolled PLWH with ≥1 cardiovascular risk factor. All participants had computerized tomography (CT) coronary angiogram and digital fundus photographs. The primary outcome was coronary atherosclerosis; secondary outcomes included obstructive CAD. In addition, we compared the performances of three models (traditional cardiovascular risk factors alone; retinal characteristics alone; and both traditional and retinal characteristics) by comparing the area under the curve (AUC) of receiver operating characteristic curves. RESULTS Among the 115 participants included in the analyses, with a mean age of 54 years, 89% were male, 95% had undetectable HIV RNA, 45% had hypertension, 40% had diabetes, 45% had dyslipidemia, and 55% had obesity, 71 (61.7%) had coronary atherosclerosis, and 23 (20.0%) had obstructive CAD. The machine-learning models, including retinal characteristics with and without traditional cardiovascular risk factors, had AUC of 0.987 and 0.979, respectively and had significantly better performance than the model including traditional cardiovascular risk factors alone (AUC 0.746) in assessing coronary artery disease atherosclerosis. The sensitivity and specificity for risk of coronary atherosclerosis in the combined model were 93.0% and 93.2%, respectively. For the assessment of obstructive CAD, models using retinal characteristics alone (AUC 0.986) or in combination with traditional risk factors (AUC 0.991) performed significantly better than traditional risk factors alone (AUC 0.777). The sensitivity and specificity for risk of obstructive CAD in the combined model were 95.7% and 97.8%, respectively. CONCLUSION In this cohort of Asian PLWH at risk of cardiovascular diseases, retinal characteristics, either alone or combined with traditional risk factors, had superior performance in assessing coronary atherosclerosis and obstructive CAD. SUMMARY People living with HIV in an Asian cohort with risk factors for cardiovascular disease had a high prevalence of coronary artery disease (CAD). A machine-learning-based retinal image analysis could increase the accuracy in assessing the risk of coronary atherosclerosis and obstructive CAD.
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Affiliation(s)
- Grace Lui
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Ho Sang Leung
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, Shatin, Hong Kong SAR
| | - Jack Lee
- Centre for Clinical Research and Biostatistics, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Chun Kwok Wong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Xinxin Li
- Centre for Clinical Research and Biostatistics, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Mary Ho
- Department of Ophthalmology, Prince of Wales Hospital, Shatin, Hong Kong SAR
| | - Vivian Wong
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Timothy Li
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Tracy Ho
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Yin Yan Chan
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Shui Shan Lee
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Alex PW Lee
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
- Laboratory of Cardiac Imaging and 3D Printing, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Ka Tak Wong
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, Shatin, Hong Kong SAR
| | - Benny Zee
- Centre for Clinical Research and Biostatistics, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
- * E-mail:
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Shahin A, Janeczek M, Butterfield R, Bhullar P, Boudreaux B, Ho T, Mangold A. LB906 Characterization of cutaneous adverse events to enfortumab vedotin. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pham H, Le A, Nguyen A, Ha U, Nguyen T, Pham T, Ho T, Vuong L. P-580 Cumulative live birth rate of oocyte in-vitro maturation with a pre-maturation step in women with polycystic ovary syndrome or high antral follicle count. Hum Reprod 2022. [DOI: 10.1093/humrep/deac107.535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
What is the cumulative live birth rate (CLBR) at 24 months of women undergoing oocyte in vitro maturation (IVM) a with pre-maturation step (CAPA-IVM)?
Summary answer
The CLBR at 24 months with CAPA-IVM was 38.2%.
What is known already
IVM with a pre-maturation step, known as capacitation IVM (CAPA-IVM) improves the competence of oocytes matured in-vitro by sustaining meiotic arrest to allow the synchronization of cytoplasmic and genetic maturation of the oocytes. Results from a randomized controlled trial showed that CAPA-IVM resulted in a live birth rate after the first transfer of 35.2% which was non-inferior to IVF. There is a lack of data on cumulative live birth following CAPA-IVM.
Study design, size, duration
A multi-center, retrospective study, performed at IVFMD, My Duc Hospital and IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital from 1 January 2017 to 31 December 2019.
Participants/materials, setting, methods
All women with polycystic ovary syndrome (PCOS) or high antral follicle count (AFC) treated with a CAPA-IVM cycle were recruited to the study. All embryos were frozen at day 3. Cumulative live birth was difined as at least one live birth resulting from initiated CAPA-IVM cycle. If the women did not return for embryo transfer, outcomes were followed up until 24 months from aspiration day. Logistic regression was performed to assess which factors predicted CLBR.
Main results and the role of chance
Between 1 January 2019 and 31 December 2019, there were 374 eligible women included in the study, among them, 368 patients had embryos for transfer (98.4%) and six patients had no embryo for transfer (1.6%). A total of 496 frozen embryo transfer (FET) cycles from 368 patients were performed. Mean age and body max index (BMI) were 29.5±3.21 years and 22.3±3.09, respectively. The maturation rate was 63.2%. The median number of embryos was 4.0 [2.00; 6.00]. The cumulative clinical pregnancy rate was 60.4%, cumulative ongoing pregnancy rate was 51.6%. At 24 months after starting the treatment, the CLBR of CAPA-IVM was 38.2%. Multivariate analysis showed that patient age and number of metaphase II oocytes were the predictive factors for cumulative live birth after CAPA-IVM.
Limitations, reasons for caution
The study limitation derives from its retrospective nature. The generalizability of the study may be limited due to the single ethnicity group.
Wider implications of the findings
In patients with PCOS or high AFC, CAPA-IVM was viable and resulted in acceptable CLBR. CAPA-IVM may be the first-line treatment for women with PCOS or high AFC requiring assisted reproduction.
Trial registration number
not applicable
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Affiliation(s)
- H Pham
- IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital , Ho Chi Minh city, Vietnam
| | - A Le
- IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital , Ho Chi Minh city, Vietnam
| | - A Nguyen
- IVFMD, My Duc Hospital, Ho Chi Minh city , Vietnam
| | - U Ha
- IVFMD Phu Nhuan, My Duc Phu Nhuan Hospital , Ho Chi Minh city, Vietnam
| | - T Nguyen
- HOPE Research center, My Duc Hospital, Ho Chi Minh city , Vietnam
| | - T Pham
- HOPE Research center, My Duc Hospital, Ho Chi Minh city , Vietnam
| | - T Ho
- IVFMD, My Duc Hospital, Ho Chi Minh city , Vietnam
| | - L Vuong
- Department of Obstetrics and Gynecology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh city , Vietnam
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Ho T, Le A, Vuong L. O-223 Latest development of IVM in assisted reproduction. Hum Reprod 2022. [DOI: 10.1093/humrep/deac106.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Latest development of IVM in assisted reproduction
In vitro maturation (IVM) is an assisted reproductive technology involving collection of immature cumulus-oocyte complexes at the prophase I stage, which are then matured to the metaphase II stage in vitro. IVM has several advantages over IVF, including negligible risk of ovarian hyperstimulation syndrome, lower medication costs, and patient convenience.
Given that IVM can be done within a relatively short time frame without the need for ovarian stimulation, it is particularly useful for fertility preservation in patients with cancer who are unable to delay chemotherapy, or in women with breast cancer for whom exposure to elevated estradiol concentrations may accelerate their disease. The European Society of Human Reproduction and Embryology (ESHRE) Guideline on Female Fertility Preservation published in 2020 suggested IVM as a fertility preservation technique.
The Practice Committees of ASRM in 2021 published the document that presented an overview of published evidence supporting the conclusion that IVM should no longer be considered an experimental technique. The potential for wider clinical application of IVM was suggested. Patient populations particularly suited to the use of IVM include women with polycystic ovaries, have higher risk of ovarian hyperstimulation syndrome, and those requiring fertility preservation.
During the last two decades, IVM has been utilized for patients with PCOS to reduce the health risks associated with ovarian hyperstimulation syndrome, for fertility preservation, or just as an alternative, more user-friendly approach to ART.
The effectiveness of IVM relies on successful synchronization of meiotic and cytoplasmic maturation of oocytes. Efforts to improve the efficacy of IVM have included the use of new IVM culture systems, aimed at enhancing the competence of IVM oocytes. Recently, the use of oocyte prematuration (or pre-IVM) culture systems to prevent spontaneous in vitro maturation processes and maintain cumulus-oocyte gap junctional communication have been described in humans.
Over the last five years, a new biphasic IVM culture system has been developed to improve the efficacy of IVM. Recent promising data from this new IVM culture system, called capacitation (CAPA) IVM, showed promising results. CAPA-IVM involves successfully maturing oocytes from small 2–8 mm follicles with no hCG injected prior to oocyte retrieval. Recently, a large RCT compared the efficacy of CAPA IVM and conventional IVF/ICSI in women with PCO showed that CAPA (biphasic) IVM was non-inferior to IVF in term of live birth rate after the first embryo transfer.
One of the concerns regarding IVM is the health of babies after utilization of this procedure. Based on currently available data, IVM appears to be safe from a neonatal health and childhood development perspective.
There is still room for further development of more efficient IVM protocols (89). Recent knowledge about oocyte physiology and development can be translated into clinical practice to improve the efficacy of these protocols.
There are several reasons why all major modern ART centers should have IVM facilities and protocols available. These include the likelihood of wider application of IVM in the future, the requirement to manage indications where IVM is the only option (e.g. fertility preservation, GROS), the increasing need for more patient-friendly ART treatment, and the fact that IVM protocols are improving thanks to advances in knowledge on human follicular and oocyte development.
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Affiliation(s)
- T Ho
- My Duc Hospital, IVFMD & HOPE Research Center , Ho Chi Minh City, Vietnam
| | - A Le
- My Duc Hospital, IVFMD Unit , Ho Chi Minh City, Vietnam
| | - L Vuong
- University of Medicine and Pharmacy at Ho Chi Minh City, Department of Obstetrics and Gynecology , Ho Chi Minh City, Vietnam
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Qiao J, Zhang Y, Liang X, Ho T, Huang HY, Kim SH, Goethberg M, Mannaerts B, Arce JC. O-110 A randomised, controlled, assessor-blind trial assessing clinical outcomes of individualised dosing with follitropin delta in Asian IVF/ICSI patients. Hum Reprod 2021. [DOI: 10.1093/humrep/deab126.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Study question
To evaluate the efficacy and safety of individualised dosing with follitropin delta versus conventional dosing with follitropin alfa in an Asian population undergoing ovarian stimulation.
Summary answer
Individualised dosing with follitropin delta results in significantly higher live birth rate and fewer early OHSS and/or preventive interventions compared to conventional follitropin alfa dosing.
What is known already
Previous randomised controlled trials conducted in Europe, North- and South America mainly including Caucasian IVF/ICSI patients as well as in Japan have demonstrated that ovarian stimulation with the individualised follitropin delta dosing regimen based on serum AMH level and body weight modulated the ovarian response and reduced the risk of OHSS without compromising pregnancy and live birth rates.
Study design, size, duration
Randomised, controlled, assessor-blind trial conducted in 1,009 Asian patients from mainland China, South Korea, Vietnam and Taiwan, undergoing their first IVF/ICSI cycle. Randomisation was stratified by age (<35, 35-37, 38-40 years). The primary endpoint was ongoing pregnancy assessed 10-11 weeks after transfer (non-inferiority limit -10.0%; analysis adjusted for age strata). Patients <35 years underwent single embryo transfer if a good-quality embryo was available, otherwise double embryo transfer. Patients ≥35 years underwent double embryo transfer.
Participants/materials, setting, methods
Follitropin delta (Rekovelle, Ferring Pharmaceuticals) daily treatment consisted of a fixed dose individualised according to each patient’s initial AMH level (<15 pmol/L: 12 μg; ≥15 pmol/L: 0.19 to 0.10 μg/kg; min-max 6-12 μg) and body weight. Follitropin alfa (Gonal-f, Merck Serono) dose was 150 IU/day for the first five days with subsequent potential dose adjustments according to individual response. A GnRH antagonist protocol was applied. OHSS was classified based on Golan’s system.
Main results and the role of chance
The ongoing pregnancy rate was 31.3% with follitropin delta and 25.7% with follitropin alfa (adjusted difference 5.4% [95% CI: -0.2%; 11.0%]). The live birth rate was significantly higher at 31.3% with follitropin delta compared to 24.7% with follitropin alfa (adjusted difference 6.4% [95% CI: 0.9%; 11.9%]; p < 0.05). Live birth rates per age stratum were as follows for follitropin delta and follitropin alfa; <35 years: 31.0% versus 25.0%, 3537 years: 35.3% versus 26.7%, 38-40 years: 20.0% versus 14.3%. Early OHSS risk, evaluated as the incidence of early OHSS and/or preventive interventions, was significantly (p < 0.01) reduced from 9.6% with follitropin alfa to 5.0% with follitropin delta. The number of oocytes was 10.0±6.1 with follitropin delta and 12.4±7.3 with follitropin alfa. Individualised follitropin delta dosing compared to conventional follitropin alfa dosing resulted in 2 more oocytes (9.6±5.3 versus 7.6±3.5) in potential low responders (AMH <15 pmol/L) and 3 fewer oocytes (10.1±6.3 versus 13.8±7.5) in potential high responders (AMH ≥15 pmol/L). Among patients with AMH ≥15 pmol/L, excessive response occurred less frequently with individualised than conventional dosing (≥15 oocytes: 20.2% versus 39.1%; ≥20 oocytes: 6.7% versus 18.5%). Total gonadotropin dose was reduced from 109.9±32.9 μg with follitropin alfa to 77.5±24.4 μg with follitropin delta.
Limitations, reasons for caution
The trial only covered the clinical outcome of one treatment cycle with fresh cleavage-stage embryo transfers.
Wider implications of the findings
The present trial implies that in addition to reducing the early OHSS risk, individualised dosing has the potential to improve the take-home baby rate in fresh cycles across all ages and with a lower gonadotropin consumption. The benefits in outcomes appear to be explained by the modulation of ovarian response.
Trial registration number
NCT03296527
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Affiliation(s)
- J Qiao
- Peking University Third Hospital, Medical Center for Human Reproduction\rDept. of OB/GYN, Beijing, China
| | - Y Zhang
- Tianjin Central Hospital of Obstetrics and Gynecology, Center for Reproductive Medicine, Tianjin, China
| | - X Liang
- The Sixth Affiliated Hospital of Sun Yat-sen University, Center for Reproductive Medicine, Guangzhou, China
| | - T Ho
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh City, Vietnam
| | - H Y Huang
- Chang Gung Memorial Hospital, Department of Obstetrics and Gynegology, Tao-Yuan City, Taiwan R.O.C
| | - S H Kim
- Asan Medical Center, Department of Obstetrics and Gynecology, Seoul, Korea- South
| | - M Goethberg
- Ferring Pharmaceuticals, Global Biometrics, Copenhagen, Denmark
| | - B Mannaerts
- Ferring Pharmaceuticals, Reproductive Medicine & Maternal Health, Copenhagen, Denmark
| | - J C Arce
- Ferring Pharmaceuticals, Reproductive Medicine & Maternal Health, Copenhagen, Denmark
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Ho T, Pham T, Le K, Ly T, Le H, Nguyen D, Ho V, Dang V, Phung T, Norman R, Mol B, Vuong L. O-233 Micronized progesterone plus dydrogesterone versus micronized progesterone alone for luteal phase support in frozen-thawed cycles: a prospective cohort study. Hum Reprod 2021. [DOI: 10.1093/humrep/deab128.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Does the addition of oral dydrogesterone to vaginal progesterone as luteal phase support improve pregnancy outcomes during frozen embryo transfer (FET) cycles compared with vaginal progesterone alone?
Summary answer
Luteal phase support with oral dydrogesterone added to vaginal progesterone improves live birth rates and reduces miscarriage rates compared with vaginal progesterone alone.
What is known already
Progesterone is an important hormone that triggers secretory transformation of the endometrium to allow implantation of the embryo. During in vitro fertilization (IVF), exogenous progesterone is administered for luteal phase support. However, there is wide inter-individual variation in absorption of progesterone via the vaginal wall. Oral dydrogesterone is effective and well tolerated when used to provide luteal phase support after fresh embryo transfer. However, there are currently no data on the effectiveness of luteal phase support with the combination of dydrogesterone with vaginal micronized progesterone compared with vaginal micronized progesterone after FET.
Study design, size, duration
Prospective cohort study conducted at an academic infertility center in Vietnam from 26 June 2019 to 30 March 2020.
Participants/materials, setting, methods
We studied 1364 women undergoing IVF with FET. The luteal support regimen was either vaginal micronized progesterone 400 mg twice daily plus oral dydrogesterone 10 mg twice daily (second part of the study) or vaginal micronized progesterone 400 mg twice daily (first 4 months of the study). The primary endpoint was live birth after the first FET of the started cycle, with miscarriage <12 weeks as one of the secondary endpoints.
Main results and the role of chance
The vaginal progesterone + dydrogesterone group and vaginal progesterone groups included 732 and 632 participants, respectively. Live birth rates were 46.3% versus 41.3%, respectively (rate ratio [RR] 1.12, 95% confidence interval [CI] 0.99–1.27, p = 0.06; multivariate analysis RR 1.30 (95% CI 1.01–1.68), p = 0.042), with a statistically significant lower rate of miscarriage at < 12 weeks (3.4% vs 6.6%; RR 0.51, 95% CI 0.32–0.83; p = 0.009). Birth weight of both singletons (2971.0 ± 628.4 vs. 3118.8 ± 559.2 g; p = 0.004) and twins (2175.5 ± 494.8 vs. 2494.2 ± 584.7; p = 0.002) was significantly lower in the progesterone plus dydrogesterone versus progesterone group.
Limitations, reasons for caution
The study were the open-label design and the non-randomized nature of the sequential administration of study treatments. However, our systematic comparison of the two strategies was able to be performed much more rapidly than a conventional randomized controlled trial. In addition, the single ethnicity population limits external generalizability.
Wider implications of the findings
Oral dydrogesterone in addition to vaginal progesterone as luteal phase support in FET cycles can reduce the miscarriage rate and improve the live birth rate. Carefully planned prospective cohort studies with limited bias could be used as an alternative to randomized controlled clinical trials to inform clinical practice.
Trial registration number
NCT03998761
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Affiliation(s)
- T Ho
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - T Pham
- My Duc Hospital, HOPE Research Center, Ho Chi Minh, Vietnam
| | - K Le
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - T Ly
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - H Le
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - D Nguyen
- My Duc Hospital, HOPE Research Center, Ho Chi Minh, Vietnam
| | - V Ho
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - V Dang
- My Duc Hospital, IVFMD and HOPE Research Center, Ho Chi Minh, Vietnam
| | - T Phung
- My Duc Hospital, IVFMD Centre, Ho Chi Minh, Vietnam
| | - R Norman
- The University of Adelaide, Robinson Research Institute and Adelaide Medical School, Adelaide, Australia
| | - B Mol
- Monash University, Department of Obstetrics & Gynaecology, Clayton, Australia
| | - L Vuong
- University of Medicine and Pharmacy at Ho Chi Minh City, Department of Obstetrics and Gynecology, Ho Chi Minh City, Vietnam
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Chan W, Tse R, Ho P, Siu S, Leung A, Tang F, Choi H, Ho T, Leung O, Lee A, Ngan R. PO-0176 Clinical outcomes of cervical cancer with CT-based image-guided brachytherapy. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)06335-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Phan T, Ho N, Vo D, Pham H, Ho T, Nguyen H, Nguyen T. Characterization of Neisseria meningitidis in Vietnam from 1980s–2019. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Lai CKC, Chen Z, Lui G, Ling L, Li T, Wong MCS, Ng RWY, Tso EYK, Ho T, Fung KSC, Ng ST, Wong BKC, Boon SS, Hui DSC, Chan PKS. Prospective Study Comparing Deep Throat Saliva With Other Respiratory Tract Specimens in the Diagnosis of Novel Coronavirus Disease 2019. J Infect Dis 2020; 222:1612-1619. [PMID: 32738137 PMCID: PMC7454747 DOI: 10.1093/infdis/jiaa487] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 07/30/2020] [Indexed: 02/05/2023] Open
Abstract
Background Self-collected specimens has been advocated to avoid infectious exposure to healthcare workers. Self-induced sputum in those with a productive cough, and saliva in those without a productive cough have been proposed, but sensitivity remains uncertain. Methods We performed a prospective study in two regional hospitals in Hong Kong Results We prospectively examined 563 serial samples collected during the virus shedding periods of 50 patients: 150 deep-throat saliva (DTS), 309 pooled-nasopharyngeal (NP) and throat swabs, and 104 sputum. DTS had the lowest overall RT-PCR positive rate (68.7% vs. 89.4% [sputum] and 80.9% [pooled NP and throat swabs]), and the lowest viral RNA concentration (mean log copy/mL 3.54 vs. 5.03 [sputum] and 4.63 [pooled NP and throat swabs]). Analyses with respect to time from symptom onset and severity also revealed similar results. Virus yield of DTS correlated with that of sputum (Pearson correlation index [95% CI]: 0.76 [0.62 – 0.86]). We estimated the overall false-negative rate of DTS could be 31.3%, and increased 2.7 times among patients without sputum. Conclusion DTS produced the lowest viral RNA concentration and RT-PCR positive rate compared to conventional respiratory specimens in all phases of illness. Self-collect sputum should be the choice for patients with sputum.
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Affiliation(s)
- Christopher K C Lai
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region (SAR), China
| | - Zigui Chen
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region (SAR), China
| | - Grace Lui
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lowell Ling
- Department of Anesthesia and Intensive Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Timothy Li
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Martin C S Wong
- School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Rita W Y Ng
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region (SAR), China
| | - Eugene Y K Tso
- United Christian Hospital, Hospital Authority, Hong Kong SAR, China
| | - Tracy Ho
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kitty S C Fung
- United Christian Hospital, Hospital Authority, Hong Kong SAR, China
| | - Siu T Ng
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Barry K C Wong
- United Christian Hospital, Hospital Authority, Hong Kong SAR, China
| | - Siaw S Boon
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region (SAR), China
| | - David S C Hui
- Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Paul K S Chan
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region (SAR), China.,Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong SAR, China
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11
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Bhalla A, Zhao N, Rivas DD, Ho T, Perez de Llano L, Mukherjee M, Nair P. Exacerbations of Severe Asthma While on Anti-IL-5 Biologics. J Investig Allergol Clin Immunol 2020; 30:307-316. [PMID: 32573459 DOI: 10.18176/jiaci.0628] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Anti-interleukin 5 (IL-5) and anti-IL-5 receptor α monoclonal antibodies markedly decrease airway and peripheral blood eosinophil numbers and are thus highly effective in reducing asthma exacerbations. Nonetheless, these biologics do not completely resolve exacerbations. There is very little information on the cellular nature of exacerbations during treatment with biologics. Using illustrative clinical case scenarios, we highlight the importance of carefully characterizing asthmatics at the time of exacerbation and recognizing neutrophilic causes of exacerbations to ensure optimal management. While an eosinophilic exacerbation may improve with more corticosteroids or by switching to another anti-IL-5 monoclonal antibody, a noneosinophilic exacerbation will likely not. An infective exacerbation needs to be recognized, and the pathogen must be identified and treated with the appropriate antimicrobial agent.
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Affiliation(s)
- A Bhalla
- Firestone Institute for Respiratory Health, St Joseph's Healthcare & Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - N Zhao
- Firestone Institute for Respiratory Health, St Joseph's Healthcare & Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - D D Rivas
- Department of Respiratory Medicine, Lucus Augusti University Hospital, EOXI, Lugo Cervo, Monforte, Spain
| | - T Ho
- Firestone Institute for Respiratory Health, St Joseph's Healthcare & Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - L Perez de Llano
- Department of Respiratory Medicine, Lucus Augusti University Hospital, EOXI, Lugo Cervo, Monforte, Spain
| | - M Mukherjee
- Firestone Institute for Respiratory Health, St Joseph's Healthcare & Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - P Nair
- Firestone Institute for Respiratory Health, St Joseph's Healthcare & Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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12
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Leung S, McLeod A, Sheikholeslami Z, Shoaebargh S, Ho T, Ramanuj R, Beaudette P, Bakhtyar N, Ghorbani A. Building a robust and scalable lentiviral vector purification platform. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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McDermott D, Vaishampayan U, Matrana M, Rha S, Saavedra AZ, Ho T, Keam B, Lee JL, Joseph R, Ali S, Stadler W, Haas N, Sundararajan S, Park S, Mowat R, Picus J, Dudek A, Zakharia Y, Gan L, Atkins M. Safety and efficacy of the oral CXCR4 inhibitor X4P-001 + axitinib in advanced renal cell carcinoma patients: An analysis of subgroup responses by prior treatment. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz253.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Johnson S, Ho T. Multiple paravalvular leak closures. J Cardiothorac Vasc Anesth 2019. [DOI: 10.1053/j.jvca.2019.07.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Abstract
Over the last decade, virologists have discovered an unprecedented number of viruses using high throughput sequencing (HTS), which led to the advancement of our knowledge on the diversity of viruses in nature, particularly unraveling the virome of many agricultural crops. However, these new virus discoveries have often widened the gaps in our understanding of virus biology; the forefront of which is the actual role of a new virus in disease, if any. Yet, when used critically in etiological studies, HTS is a powerful tool to establish disease causality between the virus and its host. Conversely, with globalization, movement of plant material is increasingly more common and often a point of dispute between countries. HTS could potentially resolve these issues given its capacity to detect and discover. Although many pipelines are available for plant virus discovery, all share a common backbone. A description of the process of plant virus detection and discovery from HTS data are presented, providing a summary of the different pipelines available for scientists' utility in their research.
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Affiliation(s)
- D E V Villamor
- 1 Department of Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701
| | - T Ho
- 1 Department of Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701
| | - M Al Rwahnih
- 2 Department of Plant Pathology, University of California, Davis 95616; and
| | - R R Martin
- 3 Horticulture Crops Research Unit, U.S. Department of Agriculture-Agricultural Research Service, Corvallis, OR 97330
| | - I E Tzanetakis
- 1 Department of Plant Pathology, Division of Agriculture, University of Arkansas System, Fayetteville, AR 72701
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16
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Wang L, Dehm SM, Hillman DW, Sicotte H, Tan W, Gormley M, Bhargava V, Jimenez R, Xie F, Yin P, Qin S, Quevedo F, Costello BA, Pitot HC, Ho T, Bryce AH, Ye Z, Li Y, Eiken P, Vedell PT, Barman P, McMenomy BP, Atwell TD, Carlson RE, Ellingson M, Eckloff BW, Qin R, Ou F, Hart SN, Huang H, Jen J, Wieben ED, Kalari KR, Weinshilboum RM, Wang L, Kohli M. A prospective genome-wide study of prostate cancer metastases reveals association of wnt pathway activation and increased cell cycle proliferation with primary resistance to abiraterone acetate-prednisone. Ann Oncol 2019; 29:352-360. [PMID: 29069303 DOI: 10.1093/annonc/mdx689] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Background Genomic aberrations have been identified in metastatic castration-resistant prostate cancer (mCRPC), but molecular predictors of resistance to abiraterone acetate/prednisone (AA/P) treatment are not known. Patients and methods In a prospective clinical trial, mCRPC patients underwent whole-exome sequencing (n = 82) and RNA sequencing (n = 75) of metastatic biopsies before initiating AA/P with the objective of identifying genomic alterations associated with resistance to AA/P. Primary resistance was determined at 12 weeks of treatment using criteria for progression that included serum prostate-specific antigen measurement, bone and computerized tomography imaging and symptom assessments. Acquired resistance was determined using the end point of time to treatment change (TTTC), defined as time from enrollment until change in treatment from progressive disease. Associations of genomic and transcriptomic alterations with primary resistance were determined using logistic regression, Fisher's exact test, single and multivariate analyses. Cox regression models were utilized for determining association of genomic and transcriptomic alterations with TTTC. Results At 12 weeks, 32 patients in the cohort had progressed (nonresponders). Median study follow-up was 32.1 months by which time 58 patients had switched treatments due to progression. Median TTTC was 10.1 months (interquartile range: 4.4-24.1). Genes in the Wnt/β-catenin pathway were more frequently mutated and negative regulators of Wnt/β-catenin signaling were more frequently deleted or displayed reduced mRNA expression in nonresponders. Additionally, mRNA expression of cell cycle regulatory genes was increased in nonresponders. In multivariate models, increased cell cycle proliferation scores (≥ 50) were associated with shorter TTTC (hazard ratio = 2.11, 95% confidence interval: 1.17-3.80; P = 0.01). Conclusions Wnt/β-catenin pathway activation and increased cell cycle progression scores can serve as molecular markers for predicting resistance to AA/P therapy.
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Affiliation(s)
- L Wang
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, USA
| | - S M Dehm
- Masonic Cancer Center, University of Minnesota, Minneapolis, USA; Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, USA; Department of Urology, University of Minnesota, Minneapolis, USA
| | - D W Hillman
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - H Sicotte
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - W Tan
- Department of Medicine, Mayo Clinic, Jacksonville, USA
| | - M Gormley
- Janssen Research and Development, Spring House, Philadelphia, USA
| | - V Bhargava
- Janssen Research and Development, Spring House, Philadelphia, USA
| | - R Jimenez
- Department of Pathology and Lab Medicine, Mayo Clinic, Rochester, USA
| | - F Xie
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, USA
| | - P Yin
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, USA
| | - S Qin
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, USA
| | - F Quevedo
- Department of Oncology, Mayo Clinic, Rochester, USA
| | - B A Costello
- Department of Oncology, Mayo Clinic, Rochester, USA
| | - H C Pitot
- Department of Oncology, Mayo Clinic, Rochester, USA
| | - T Ho
- Department of Medicine, Mayo Clinic, Scottsdale, USA
| | - A H Bryce
- Department of Medicine, Mayo Clinic, Scottsdale, USA
| | - Z Ye
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, USA
| | - Y Li
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - P Eiken
- Department of Radiology, Mayo Clinic, Rochester, USA
| | - P T Vedell
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - P Barman
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - B P McMenomy
- Department of Radiology, Mayo Clinic, Rochester, USA
| | - T D Atwell
- Department of Radiology, Mayo Clinic, Rochester, USA
| | - R E Carlson
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - M Ellingson
- Medical Genetics, Mayo Clinic, Rochester, USA
| | - B W Eckloff
- Medical Genome Facility, Mayo Clinic, Rochester, USA
| | - R Qin
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - F Ou
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - S N Hart
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - H Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, USA
| | - J Jen
- Medical Genome Facility, Mayo Clinic, Rochester, USA; Division of Experimental Pathology and Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, USA; Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Mayo Clinic, Rochester, USA
| | - E D Wieben
- Medical Genome Facility, Mayo Clinic, Rochester, USA
| | - K R Kalari
- Division of Biomedical Statistics and Informatics, Department of Health Sciences, Rochester, USA
| | - R M Weinshilboum
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, USA
| | - L Wang
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, USA.
| | - M Kohli
- Department of Oncology, Mayo Clinic, Rochester, USA.
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17
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Abstract
Knee osteoarthritis is one of the most common degenerative diseases causing disability in elderly patients. Osteoarthritis is an increasing problem for ageing populations, such as that in Hong Kong. It is important for guidelines to be kept up to date with the best evidence-based osteoarthritis management practices available. The aim of this study was to review the current literature and international guidelines on non-surgical treatments for knee osteoarthritis and compared these with the current guidelines in Hong Kong, which were proposed in 2005. Internationally, exercise programmes for non-surgical management of osteoarthritis have been proven effective, and a pilot programme in Hong Kong for comprehensive non-surgical knee osteoarthritis management has been successful. Long-term studies on the effectiveness of such exercise programmes are required, to inform future changes to guidelines on osteoarthritis management.
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Affiliation(s)
- H S Kan
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
| | - P K Chan
- Department of Orthopaedics and Traumatology, Queen Mary Hospital, Pokfulam, Hong Kong
| | - K Y Chiu
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
| | - C H Yan
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
| | - S S Yeung
- Department of Physiotherapy, MacLehose Medical Rehabilitation Centre, Pokfulam, Hong Kong
| | - Y L Ng
- Department of Occupational Therapy, MacLehose Medical Rehabilitation Centre, Pokfulam, Hong Kong
| | - K W Shiu
- Department of Nursing, MacLehose Medical Rehabilitation Centre, Pokfulam, Hong Kong
| | - T Ho
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong
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18
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Htoo J, Ho T, Dao T, Carpena M, Le N, Vu C, Nguyen Q. 187 Optimal standardized ileal digestible lysine and methionine + cysteine to lysine ratio for 30. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Htoo
- Evonik Nutrition & Care GmbH, No.4, Rodenbacher Chaussee,63457, Hanau, Germany, Hanau-Wolfgang,Hessen, Germany
| | - T Ho
- College of Agriculture and Forestry - Hue University,Vietnam, Hue, Vietnam
| | - T Dao
- Institute of Animal Husbandry,Hanoi, Vietnam, Hue, Vietnam
| | - M Carpena
- Evonik (SEA) Pte Ltd,Singapore, Singapore, Philippines
| | - N Le
- College of Agriculture and Forestry - Hue University,Vietnam, Hue, Vietnam
| | - C Vu
- Institute of Animal Husbandry,Hanoi, Vietnam, Hue, Vietnam
| | - Q Nguyen
- College of Agriculture and Forestry - Hue University,Vietnam, Hue, Vietnam
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19
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Vessey KA, Ho T, Jobling AI, Mills SA, Tran MX, Brandli A, Lam J, Guymer RH, Fletcher EL. Nanosecond Laser Treatment for Age-Related Macular Degeneration Does Not Induce Focal Vision Loss or New Vessel Growth in the Retina. ACTA ACUST UNITED AC 2018; 59:731-745. [DOI: 10.1167/iovs.17-23098] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Kirstan A. Vessey
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Tracy Ho
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Andrew I. Jobling
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Samuel A. Mills
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Mai X. Tran
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Alice Brandli
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Jackson Lam
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
| | - Robyn H. Guymer
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital; Department of Surgery (Ophthalmology), The University of Melbourne, Victoria, Australia
| | - Erica L. Fletcher
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Victoria, Australia
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20
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McDermott D, Joseph R, Ho T, Vaishampayan U, Ali S, Matrana M, Alter R, Edenfield J, Blanchette S, Gan L, Atkins M. A Phase (Ph) 1 dose finding study of X4P-001 (an oral CXCR4 inhibitor) and axitinib in patients with advanced renal cell carcinoma (RCC). Ann Oncol 2017. [DOI: 10.1093/annonc/mdx371.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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21
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Weinberg L, Banting J, Churilov L, McLeod RL, Fernandes K, Chao I, Ho T, Ianno D, Liang V, Muralidharan V, Christophi C, Nikfarjam M. The Effect of a Surgery-Specific Cardiac Output–Guided Haemodynamic Algorithm on Outcomes in Patients Undergoing Pancreaticoduodenectomy in a High-Volume Centre: A Retrospective Comparative Study. Anaesth Intensive Care 2017; 45:569-580. [DOI: 10.1177/0310057x1704500507] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this retrospective observational study performed in a high-volume hepatobiliary–pancreatic unit, we evaluated the effect of a surgery-specific goal-directed therapy (GDT) physiologic algorithm on complications and length of hospital stay. We compared patients who underwent pancreaticoduodenectomy with either a standardised Enhanced Recovery After Surgery program (usual care group), or a standardised Enhanced Recovery After Surgery program in combination with a surgery-specific cardiac output–guided algorithm (GDT group). We included 145 consecutive patients: 47 in the GDT group and 98 in the usual care group. Multivariable associations between GDT and lengths of stay and complications were investigated using negative binomial regression. Postoperative complications were common and occurred at similar frequencies amongst the GDT and usual care groups: 64% versus 68% respectively, P=0.71; odds ratio 0.82; (95% confidence interval 0.39–1.70). There were fewer cardiorespiratory complications in the GDT group. Median (interquartile range) length of hospital stay was ten days (8.0–14.0) in the GDT group compared to 13 days (8.8–21.3) in the usual care group, P=0.01. Median (interquartile range) total intraoperative fluid was 3,000 ml (2,050–4,175) in the GDT group compared to 4,500 ml (3,275–5,325) in the usual care group, P <0.0001; but by day one, the median (interquartile range) fluid balance was similar (1,198 ml [700–1,729] in the GDT group versus 977 ml [419–2,044] in the usual care group, P=0.96). Use of vasoactive medications was higher in the GDT group. In our patients undergoing pancreaticoduodenectomy, GDT was associated with restrictive intraoperative fluid intervention, fewer cardiorespiratory complications and a shorter hospital length of stay compared to usual care. However, we could not exclude an influence of surgical caseload, which we have previously found to be an important variable. We also could not relate the increased hospital length of stay to cardiorespiratory complications in individual patients. Therefore, these observational retrospective findings would require confirmation in a prospective randomised study.
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Affiliation(s)
- L. Weinberg
- Director of Anaesthesia, Austin Health; Associate Professor, Department of Surgery, Austin Hospital, The University of Melbourne, Melbourne, Victoria
| | - J. Banting
- University of Melbourne, Melbourne, Victoria
| | - L. Churilov
- Statistics and Decision Analysis Academic Platform, The Florey Institute of Neuroscience and Mental Health, Melbourne, Victoria
| | | | | | - I. Chao
- Department of Anaesthesia, Austin Hospital, Melbourne, Victoria
| | - T. Ho
- Department of Anaesthesia, Austin Hospital, Melbourne, Victoria
| | - D. Ianno
- University of Melbourne, Melbourne, Victoria
| | - V. Liang
- Department of Anaesthesia, Austin Hospital, Melbourne, Victoria
| | - V. Muralidharan
- Hepatobiliary Surgeon, Associate Professor, Department of Surgery, Austin Hospital, The University of Melbourne, Melbourne, Victoria
| | - C. Christophi
- Department of Surgery, University of Melbourne, Melbourne, Victoria
| | - M. Nikfarjam
- Hepatobiliary Surgeon, Associate Professor, Department of Surgery, Austin Hospital, The University of Melbourne, Melbourne, Victoria
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22
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Weng H, Ho T, Zhu Y, Huang S, Lu L. GOVERNANCE, LABOR FORCE PARTICIPATION RATES AND LIFE SATISFACTION FOR THE ELDERLY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H. Weng
- Institute of Gerontology, National Cheng Kung University, Tainan City, Tainan, Taiwan
| | - T. Ho
- Institute of Gerontology, National Cheng Kung University, Tainan City, Tainan, Taiwan
| | - Y. Zhu
- Institute of Gerontology, National Cheng Kung University, Tainan City, Tainan, Taiwan
| | - S. Huang
- Institute of Gerontology, National Cheng Kung University, Tainan City, Tainan, Taiwan
| | - L. Lu
- Institute of Gerontology, National Cheng Kung University, Tainan City, Tainan, Taiwan
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23
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Li J, Yang K, Ju T, Ho T, McKay CA, Gao Y, Forget SK, Gartner SR, Field CJ, Chan CB, Willing BP. Early life antibiotic exposure affects pancreatic islet development and metabolic regulation. Sci Rep 2017; 7:41778. [PMID: 28150721 PMCID: PMC5288777 DOI: 10.1038/srep41778] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 12/30/2016] [Indexed: 12/12/2022] Open
Abstract
Childhood antibiotic exposure has been recently linked with increased risk of metabolic disease later in life. A better understanding of this association would potentially provide strategies to reduce the childhood chronic disease epidemic. Therefore, we explored the underlying mechanisms using a swine model that better mimics human infants than rodents, and demonstrated that early life antibiotic exposure affects glucose metabolism 5 weeks after antibiotic withdrawal, which was associated with changes in pancreatic development. Antibiotics exerted a transient impact on postnatal gut microbiota colonization and microbial metabolite production, yet changes in the expression of key genes involved in short-chain fatty acid signaling and pancreatic development were detected in later life. These findings suggest a programming effect of early life antibiotic exposure that merits further investigation.
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Affiliation(s)
- Jiaying Li
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Kaiyuan Yang
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Tingting Ju
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Tracy Ho
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Catharine A McKay
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Yanhua Gao
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Shay K Forget
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Stephanie R Gartner
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Catherine J Field
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
| | - Catherine B Chan
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada.,Department of Physiology, University of Alberta, Edmonton, AB, T6G 2H7, Canada
| | - Benjamin P Willing
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada
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24
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Wei D, Osman C, Dukhovny D, Romley J, Hall M, Chin S, Ho T, Friedlich PS, Lakshmanan A. Cost consciousness among physicians in the neonatal intensive care unit. J Perinatol 2016; 36:1014-1020. [PMID: 27467561 DOI: 10.1038/jp.2016.117] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 06/20/2016] [Accepted: 06/27/2016] [Indexed: 11/09/2022]
Abstract
OBJECTIVE The objectives of this study were (1) to describe the prevalence and correlates of cost consciousness among physician providers in neonatology and (2) to describe knowledge of cost of common medications, laboratory/imaging evaluations, hospitalization costs and reimbursements. STUDY DESIGN A 54-item survey was administered to members of the Section on Neonatal-Perinatal Medicine of the American Academy of Pediatrics. RESULTS Of the 602 participants, 37% reported cost consciousness in decision making. Adjusting for years in practice, gender, training level, type of practice setting and region of practice, formalized education about costs was associated with increased cost consciousness in practice (adjusted odds ratio (AOR): 3.4; 95% confidence interval (CI): 1.2 to 9.8). Working in a private practice setting was also associated with increased cost consciousness when ordering laboratory (AOR: 3.0; (95% CI: 1.2 to 7.6)) or imaging tests (AOR: 2.0; 95% CI: 1.0 to 4.8). CONCLUSIONS We found variation in knowledge of cost. Formal education about costs and working in a private practice setting were associated with increased cost consciousness.
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Affiliation(s)
- D Wei
- Neonatology, Children's Hospital Oakland, Oakland, CA, USA
| | - C Osman
- Center for Fetal and Neonatal Medicine, USC Division of Neonatal Medicine, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - D Dukhovny
- Pediatrics, Oregon Health and Science University, Portland, OR, USA
| | - J Romley
- Leonard D. Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA, USA
| | - M Hall
- Children's Hospital Association, Overland Park, KS, USA
| | - S Chin
- Center for Fetal and Neonatal Medicine, USC Division of Neonatal Medicine, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - T Ho
- Department of Neonatology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - P S Friedlich
- Center for Fetal and Neonatal Medicine, USC Division of Neonatal Medicine, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - A Lakshmanan
- Center for Fetal and Neonatal Medicine, USC Division of Neonatal Medicine, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.,Leonard D. Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA, USA.,Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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25
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Ho T, Aplin FP, Jobling AI, Phipps JA, de Iongh RU, Greferath U, Vessey KA, Fletcher EL. Localization and Possible Function of P2X Receptors in Normal and Diseased Retinae. J Ocul Pharmacol Ther 2016; 32:509-517. [DOI: 10.1089/jop.2015.0158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Tracy Ho
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Felix P. Aplin
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Andrew I. Jobling
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Joanna A. Phipps
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Robb U. de Iongh
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Ursula Greferath
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Kirstan A. Vessey
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
| | - Erica L. Fletcher
- Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Australia
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Choueiri T, Agarwal N, Ho T, Pal S, Seon B, Jivani M, Adams B, Shazer R, Theuer C. TRAXAR study: a randomized phase 2 trial of axitinib and TRC105 versus axitinib alone in patients with advanced or metastatic renal cell carcinoma (mRCC). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw373.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Horiuchi Y, Kondo MA, Okada K, Takayanagi Y, Tanaka T, Ho T, Varvaris M, Tajinda K, Hiyama H, Ni K, Colantuoni C, Schretlen D, Cascella NG, Pevsner J, Ishizuka K, Sawa A. Molecular signatures associated with cognitive deficits in schizophrenia: a study of biopsied olfactory neural epithelium. Transl Psychiatry 2016; 6:e915. [PMID: 27727244 PMCID: PMC5315541 DOI: 10.1038/tp.2016.154] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 06/21/2016] [Accepted: 07/12/2016] [Indexed: 01/10/2023] Open
Abstract
Cognitive impairment is a key feature of schizophrenia (SZ) and determines functional outcome. Nonetheless, molecular signatures in neuronal tissues that associate with deficits are not well understood. We conducted nasal biopsy to obtain olfactory epithelium from patients with SZ and control subjects. The neural layers from the biopsied epithelium were enriched by laser-captured microdissection. We then performed an unbiased microarray expression study and implemented a systematic neuropsychological assessment on the same participants. The differentially regulated genes in SZ were further filtered based on correlation with neuropsychological traits. This strategy identified the SMAD 5 gene, and real-time quantitative PCR analysis also supports downregulation of the SMAD pathway in SZ. The SMAD pathway has been important in multiple tissues, including the role for neurodevelopment and bone formation. Here the involvement of the pathway in adult brain function is suggested. This exploratory study establishes a strategy to better identify neuronal molecular signatures that are potentially associated with mental illness and cognitive deficits. We propose that the SMAD pathway may be a novel target in addressing cognitive deficit of SZ in future studies.
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Affiliation(s)
- Y Horiuchi
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - M A Kondo
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Okada
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - Y Takayanagi
- Department of Mental Health, Johns Hopkins University, Baltimore, MD, USA
| | - T Tanaka
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - T Ho
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - M Varvaris
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Tajinda
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - H Hiyama
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - K Ni
- Pharmacology Research Labs, Astellas Pharma Inc., Tsukuba-shi, Ibaraki, Japan
| | - C Colantuoni
- Lieber Institute for Brain Development, Baltimore, MD, USA
| | - D Schretlen
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - N G Cascella
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - J Pevsner
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA,Hugo W Moser Research Institute at Kennedy Krieger, Baltimore, MD, USA
| | - K Ishizuka
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA
| | - A Sawa
- Department of Psychiatry, Johns Hopkins University, Baltimore, MD, USA,Department of Mental Health, Johns Hopkins University, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins School of Medicine, 600 North Wolfe Street, Meyer 3-166A, Baltimore, MD 21287, USA. E-mail:
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Powles T, Escudier B, de Souza P, Chowdhury S, Pook D, Harmenberg U, Basappa N, Geynisman D, Merchan J, Redman B, Ryan C, Goodman O, Ho T, Singh P, Lougheed J, Patel M, Knox J, Motzer R, Choueiri T. Efficacy of cabozantinib (cabo) vs everolimus (eve) by metastatic site and tumor burden in patients (pts) with advanced renal cell carcinoma (RCC) in the phase 3 METEOR trial. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw373.41] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ho T, Sino H, Schulze J. Fear of mercury toxicity by dental patients is not influenced by information. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.2083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ho T, Yeh F, Huang K, Sung S, Hsu L, Tsai H, Hsu T. Differential mechanisms of cadmium and mercury(II)-induced down-regulation of DNA mismatch binding activities in zebrafish (Danio rerio) embryos. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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31
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Sino H, Ho T, Schulze J. Mercury, amalgam and toxicity knowledge in dental patients. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.2082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Michelson KA, Ho T, Pelletier A, Al Ayubi S, Bourgeois F. A Mobile, Collaborative, Real Time Task List for Inpatient Environments. Appl Clin Inform 2016; 6:677-83. [PMID: 26767063 DOI: 10.4338/aci-2015-05-cr-0050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 09/20/2015] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Inpatient teams commonly track their tasks using paper checklists that are not shared between team members. Team members frequently communicate redundantly in order to prevent errors. METHODS We created a mobile, collaborative, real-time task list application on the iOS platform. The application listed tasks for each patient, allowed users to check them off as completed, and transmitted that information to all other team members. In this report, we qualitatively describe our experience designing and piloting the application with an inpatient pediatric ward team at an academic pediatric hospital. RESULTS We successfully created the tasklist application, however team members showed limited usage. CONCLUSION Physicians described that they preferred the immediacy and familiarity of paper, and did not experience an efficiency benefit when using the electronic tasklist.
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Affiliation(s)
- K A Michelson
- Boston Children's Hospital , Boston, MA, United States
| | - T Ho
- Boston Children's Hospital , Boston, MA, United States
| | - A Pelletier
- Boston Children's Hospital, Innovation Acceleration Program , Boston, MA, United States
| | - S Al Ayubi
- Boston Children's Hospital, Innovation Acceleration Program , Boston, MA, United States
| | - F Bourgeois
- Boston Children's Hospital , Boston, MA, United States
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Ho T, Jobling AI, Greferath U, Chuang T, Ramesh A, Fletcher EL, Vessey KA. Vesicular expression and release of ATP from dopaminergic neurons of the mouse retina and midbrain. Front Cell Neurosci 2015; 9:389. [PMID: 26500494 PMCID: PMC4593860 DOI: 10.3389/fncel.2015.00389] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 09/17/2015] [Indexed: 12/20/2022] Open
Abstract
Vesicular nucleotide transporter (VNUT) is required for active accumulation of adenosine tri-phosphate (ATP) into vesicles for purinergic neurotransmission, however, the cell types that express VNUT in the central nervous system remain unknown. This study characterized VNUT expression within the mammalian retina and brain and assessed a possible functional role in purinergic signaling. Two native isoforms of VNUT were detected in mouse retina and brain based on RNA transcript and protein analysis. Using immunohistochemistry, VNUT was found to co-localize with tyrosine hydroxylase (TH) positive, dopaminergic (DA) neurons of the substantia nigra and ventral tegmental area, however, VNUT expression in extranigral non-DA neurons was also observed. In the retina, VNUT labeling was found to co-localize solely with TH-positive DA-cells. In the outer retina, VNUT-positive interplexiform cell processes were in close contact with horizontal cells and cone photoreceptor terminals, which are known to express P2 purinergic-receptors. In order to assess function, dissociated retinal neurons were loaded with fluorescent ATP markers (Quinacrine or Mant-ATP) and the DA marker FFN102, co-labeled with a VNUT antibody and imaged in real time. Fluorescent ATP markers and FFN102 puncta were found to co-localize in VNUT positive neurons and upon stimulation with high potassium, ATP marker fluorescence at the cell membrane was reduced. This response was blocked in the presence of cadmium. These data suggest DA neurons co-release ATP via calcium dependent exocytosis and in the retina this may modulate the visual response by activating purine receptors on closely associated neurons.
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Affiliation(s)
- Tracy Ho
- Visual Neuroscience Laboratory, Department of Anatomy and Neuroscience, The University of Melbourne Parkville, VIC, Australia
| | - Andrew I Jobling
- Visual Neuroscience Laboratory, Department of Anatomy and Neuroscience, The University of Melbourne Parkville, VIC, Australia
| | - Ursula Greferath
- Visual Neuroscience Laboratory, Department of Anatomy and Neuroscience, The University of Melbourne Parkville, VIC, Australia
| | - Trinette Chuang
- Polyclonal Antibody Development, R&D Antibody Development, EMD Millipore Temecula, CA, USA
| | - Archana Ramesh
- Polyclonal Antibody Development, R&D Antibody Development, EMD Millipore Temecula, CA, USA
| | - Erica L Fletcher
- Visual Neuroscience Laboratory, Department of Anatomy and Neuroscience, The University of Melbourne Parkville, VIC, Australia
| | - Kirstan A Vessey
- Visual Neuroscience Laboratory, Department of Anatomy and Neuroscience, The University of Melbourne Parkville, VIC, Australia
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Jimenez R, Sicotte H, Barman P, Sinnwell J, Eiken P, Atwell T, McMenomy B, Tan W, Wu K, Bryce A, Ho T, Pitot H, Quevedo J, Costello B, Dronca R, Moynihan T, Wang L, Qin R, Carlson R, Kohli M. 2523 Feasibility analysis of pathology and genetic yield from a prospective trial of tissue biopsies in metastatic castrate resistant prostate cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31342-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kohli M, Tan W, Eiken P, McMenomy B, Atwell T, Carlson R, Campion M, Wang L, Costello B, Pitot H, Quevedo F, Ho T, Bryce A, Qin R, Paz-Fumagalli R, Moynihan T, Dronca R, Liu M. 2573 Impact of biopsy of metastases on circulating tumor cell (CTC) counts in castrate resistant prostate cancer (CRPC). Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31392-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Vessey KA, Waugh M, Jobling AI, Phipps JA, Ho T, Trogrlic L, Greferath U, Fletcher EL. Assessment of retinal function and morphology in aging Ccl2 knockout mice. Invest Ophthalmol Vis Sci 2015; 56:1238-52. [PMID: 25626968 DOI: 10.1167/iovs.14-15334] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The chemokine Ccl2, or monocyte chemoattractant protein-1 (MCP-1), has previously been identified as playing a potential role in many ocular diseases; however, its role in mice is less clear. We sought to correlate changes in retinal pigment epithelium (RPE) and retinal morphology with changes in function in aging Ccl2(-/-) mice. METHODS Ccl2(-/-) mice on a C57BL6J background were genotyped for Crb1(rd8/rd8) and were free of this mutation. Ccl2(-/-) mice and wild-type (WT) C57BL6J mice were investigated for changes in the retinal fundus and histology as a function of age. The function of the rod and cone pathways, and the rate of dark adaptation, was assessed using the electroretinogram (ERG) up to 15 months of age. RESULTS Fifteen-month-old Ccl2(-/-) mice had fundus lesions, more subretinal microglia/macrophages, and an increase in RPE cell size, indicative of RPE cell loss, when compared with WT mice. Within the retina, gross morphology was normal but there was an increase in Müller cell gliosis and microglial activation. These morphological changes in the Ccl2(-/-) RPE/retina did not correlate with a change in either rod or cone ERG pathway function, or with the rate of dark adaptation. CONCLUSIONS These data show that Ccl2 is important for preserving RPE and glial morphology with age, yet retinal function and gross morphology are maintained. Altered signaling in this chemokine pathway may, however, increase RPE and retinal vulnerability to disease.
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Affiliation(s)
- Kirstan A Vessey
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Michelle Waugh
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Andrew I Jobling
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Joanna A Phipps
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Tracy Ho
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Lidia Trogrlic
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Ursula Greferath
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
| | - Erica L Fletcher
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
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Ho T, Pfeffer P, Mann E, Kelly F, Matthews N, Hawrylowicz C. S48 Air Pollution Particulate Matter Promotes Dc Maturation And Enhances Their Stimulation Of Cd8 Lymphocyte Responses. Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Fletcher EL, Jobling AI, Greferath U, Mills SA, Waugh M, Ho T, de Iongh RU, Phipps JA, Vessey KA. Studying age-related macular degeneration using animal models. Optom Vis Sci 2014; 91:878-86. [PMID: 24978866 PMCID: PMC4186726 DOI: 10.1097/opx.0000000000000322] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Over the recent years, there have been tremendous advances in our understanding of the genetic and environmental factors associated with the development of age-related macular degeneration (AMD). Examination of retinal changes in various animals has aided our understanding of the pathogenesis of the disease. Notably, mouse strains, carrying genetic anomalies similar to those affecting humans, have provided a foundation for understanding how various genetic risk factors affect retinal integrity. However, to date, no single mouse strain that develops all the features of AMD in a progressive age-related manner has been identified. In addition, a mutation present in some background strains has clouded the interpretation of retinal phenotypes in many mouse strains. The aim of this perspective was to describe how animals can be used to understand the significance of each sign of AMD, as well as key genetic risk factors.
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Affiliation(s)
- Erica L Fletcher
- *MScOptom, PhD †PhD ‡BSc(Hons) §MOptom, PhD Department of Anatomy and Neuroscience, The University of Melbourne, Parkville, Victoria, Australia (all authors)
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Vessey KA, Greferath U, Aplin FP, Jobling AI, Phipps JA, Ho T, De Iongh RU, Fletcher EL. Adenosine triphosphate-induced photoreceptor death and retinal remodeling in rats. J Comp Neurol 2014; 522:2928-50. [PMID: 24639102 PMCID: PMC4265795 DOI: 10.1002/cne.23558] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 02/06/2014] [Accepted: 02/07/2014] [Indexed: 02/06/2023]
Abstract
Many common causes of blindness involve the death of retinal photoreceptors, followed by progressive inner retinal cell remodeling. For an inducible model of retinal degeneration to be useful, it must recapitulate these changes. Intravitreal administration of adenosine triphosphate (ATP) has recently been found to induce acute photoreceptor death. The aim of this study was to characterize the chronic effects of ATP on retinal integrity. Five-week-old, dark agouti rats were administered 50 mM ATP into the vitreous of one eye and saline into the other. Vision was assessed using the electroretinogram and optokinetic response and retinal morphology investigated via histology. ATP caused significant loss of visual function within 1 day and loss of 50% of the photoreceptors within 1 week. At 3 months, 80% of photoreceptor nuclei were lost, and total photoreceptor loss occurred by 6 months. The degeneration and remodeling were similar to those found in heritable retinal dystrophies and age-related macular degeneration and included inner retinal neuronal loss, migration, and formation of new synapses; Müller cell gliosis, migration, and scarring; blood vessel loss; and retinal pigment epithelium migration. In addition, extreme degeneration and remodeling events, such as neuronal and glial migration outside the neural retina and proliferative changes in glial cells, were observed. These extreme changes were also observed in the 2-year-old P23H rhodopsin transgenic rat model of retinitis pigmentosa. This ATP-induced model of retinal degeneration may provide a valuable tool for developing pharmaceutical therapies or for testing electronic implants aimed at restoring vision.
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Affiliation(s)
- Kirstan A Vessey
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Ursula Greferath
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Felix P Aplin
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital,East Melbourne, Victoria, 3002, Australia
- The Bionics Institute,East Melbourne, Victoria, 3002, Australia
| | - Andrew I Jobling
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Joanna A Phipps
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Tracy Ho
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Robbert U De Iongh
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
| | - Erica L Fletcher
- Department of Anatomy and Neuroscience, The University of Melbourne,Melbourne, Victoria, 3010, Australia
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Bernardini M, Gien L, Nelson G, Lau S, Ferguson S, Samouelian V, Altman A, Cameron A, Ho T, McAlpine J. Variations in practice for the management of high-risk histologic subtypes in endometrial cancer: A CHREC (Consortium of High Risk Endometrial Cancer) Canadian project. Gynecol Oncol 2014. [DOI: 10.1016/j.ygyno.2014.03.353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yegneswaran B, Parket R, Gawel S, Pritchard-Bell A, Ho T, Clermont G. Association between average glucose levels and hospital mortality among critically ill patients. Crit Care 2013. [PMCID: PMC3643166 DOI: 10.1186/cc12396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Gawel SP, Clermont G, Ho T, Newman BM, Yegneswaran B, Parker RS. Individualized targeted glucose control to avoid hypoglycemia. Crit Care 2013. [PMCID: PMC3643172 DOI: 10.1186/cc12394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Vessey KA, Greferath U, Jobling AI, Phipps JA, Ho T, Waugh M, Fletcher EL. Ccl2/Cx3cr1 knockout mice have inner retinal dysfunction but are not an accelerated model of AMD. Invest Ophthalmol Vis Sci 2012; 53:7833-46. [PMID: 23074204 DOI: 10.1167/iovs.12-10650] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE The chemokine, Ccl2, and the fractalkine receptor, Cx3cr1, have both been implicated in the pathogenesis of age related macular degeneration (AMD), with mice lacking both genes exhibiting features of AMD by 3 months of age. However, recent reports indicate that this ascribed phenotype is due to the presence of a retinal degeneration mutation (crb1(rd8/rd8), rd8) on the background strain. Our aim was to characterize the retinal effects of lack of Ccl2 and Cx3cr1 (Ccl2(-/-)/Cx3cr1(EGFP/EGFP), CDKO-mice), in mice without the rd8 mutation. METHODS Nine-month-old, CDKO and wildtype C57blk6J mice were investigated for retinal fundus appearance and histology. The function of the rod and cone pathways was assessed using the ERG. RESULTS The CDKO mice did not develop lesions in the retinal fundus, and the ultrastructure of Bruch's membrane and the RPE were similar to that of C57blk6J mice. From the ERG, there was no change in the amplitude of the rod photoreceptor response, or in the rod or cone post-photoreceptor b-wave. However, the rod and cone ERG oscillatory potentials were significantly reduced in the CDKO animals, a phenotype apparent in Cx3cr1(EGFP/EGFP)- but not Ccl2(-/-)-founder lines. This correlated with aberrant amacrine cell morphology in the CDKO mice. In addition, Müller cells were gliotic and microglial morphology subtly altered, indicative of retinal stress. CONCLUSIONS These results suggest that in the absence of the rd8 mutation, the CDKO-mouse has a mild inner retinal phenotype characterized by altered amacrine cell function, but that it is not an accelerated model of AMD.
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Affiliation(s)
- Kirstan A Vessey
- Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Australia
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Ho T, Yap N, Roberts R, Stewart A. 272 Mechanisms of Translational Derepression During Ischemia. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ho T, Ester E, Abuyo N, Modir S, Serences J. Individual differences in working memory capacity predict the speed of perceptual decision making. J Vis 2012. [DOI: 10.1167/12.9.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Fayolle G, Levick W, Lajiness-O'Neill R, Fastenau P, Briskin S, Bass N, Silva M, Critchfield E, Nakase-Richardson R, Hertza J, Loughan A, Perna R, Northington S, Boyd S, Anderson A, Peery S, Chafetz M, Maris M, Ramezani A, Sylvester C, Goldberg K, Constantinou M, Karekla M, Hall J, Edwards M, Balldin V, Strutt A, Pavlik V, Marquez de la Plata C, Cullum M, lacritz L, Reisch J, Massman P, Royall D, Barber R, Younes S, Wiechmann A, O'Bryant S, Patel K, Suhr J, Patel K, Suhr J, Chari S, Yokoyama J, Bettcher B, Karydas A, Miller B, Kramer J, Zec R, Fritz S, Kohlrus S, Robbs R, Ala T, Gifford K, Cantwell N, Romano R, Jefferson A, Holland A, Newton S, Bunting J, Coe M, Carmona J, Harrison D, Puente A, Terry D, Faraco C, Brown C, Patel A, Watts A, Kent A, Siegel J, Miller S, Ernst W, Chelune G, Holdnack J, Sheehan J, Duff K, Pedraza O, Crawford J, Terry D, Puente A, Brown C, Faraco C, Watts A, Patel A, Kent A, Siegel J, Miller L, Younes S, Hobson Balldin V, Benavides H, Johnson L, Hall J, 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Edgeworth D, Ho T, O'Connell O, Clancy L, Fleming C, Shortt C, Murphy D, Corcoran D, Plant B. 131 The clinical implications of MRSA colonisation in a cohort of Irish adult cystic fibrosis (CF) patients and MRSA carrier frequency and clinical sequelae in their household contacts. J Cyst Fibros 2012. [DOI: 10.1016/s1569-1993(12)60301-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ho T, Pearlman E, Lewis D, Hamalainen M, Connor K, Michelson D, Zhang Y, Harper-Mozley L, Strickler N, Bachman R, Mahoney E, Lines C, Hewitt D. Efficacy and Tolerability of Rizatriptan for Treatment of a Single Migraine Attack in Pediatric Migraineurs: Results from a Randomized, Double-Blind, Placebo-Controlled Trial Using a Novel Enrichment Design (P03.240). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Hewitt D, Pearlman E, Lewis D, Hamalainen M, Connor K, Michelson D, Ceesay P, Bachman R, Harper-Mozley L, Dupre N, Strickler N, Mahoney E, Lines C, Ho T. Long-Term Safety and Tolerability of Rizatriptan for Intermittent Acute Treatment of Migraine in Pediatric Migraineurs (P03.232). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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