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Cataldo Bascuñan LR, Lyons C, Bennet H, Artner I, Fex M. Serotonergic regulation of insulin secretion. Acta Physiol (Oxf) 2019; 225:e13101. [PMID: 29791774 DOI: 10.1111/apha.13101] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 10/24/2017] [Revised: 05/14/2018] [Accepted: 05/17/2018] [Indexed: 12/13/2022]
Abstract
The exact physiological role for the monoamine serotonin (5-HT) in modulation of insulin secretion is yet to be fully understood. Although the presence of this monoamine in islets of Langerhans is well established, it is only with recent advances that the complex signalling network in islets involving 5-HT is being unravelled. With more than fourteen different 5-HT receptors expressed in human islets and receptor-independent mechanisms in insulin-producing β-cells, our understanding of 5-HT's regulation of insulin secretion is increasing. It is now widely accepted that failure of the pancreatic β-cell to release sufficient amounts of insulin is the main cause of type 2 diabetes (T2D), an ongoing global epidemic. In this context, 5-HT signalling may be of importance. In fact, 5-HT may serve an essential role in regulating the release of insulin and glucagon, the two main hormones that control glucose and lipid homoeostasis. In this review, we will discuss past and current understanding of 5-HT's role in the endocrine pancreas.
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Affiliation(s)
- L. R. Cataldo Bascuñan
- Endocrine Cell Differentiation and Function Group; Stem Cell Centre; Lund University; Lund Sweden
| | - C. Lyons
- Department of Clinical Sciences in Malmö; Unit of Molecular Metabolism; Lund University Diabetes Centre; Lund University; Malmö Sweden
- Clinical Research Center; Lund University; Malmö Sweden
- Malmö University Hospital; Lund University; Malmö Sweden
| | - H. Bennet
- Department of Clinical Sciences in Malmö; Unit of Molecular Metabolism; Lund University Diabetes Centre; Lund University; Malmö Sweden
- Clinical Research Center; Lund University; Malmö Sweden
- Malmö University Hospital; Lund University; Malmö Sweden
| | - I. Artner
- Endocrine Cell Differentiation and Function Group; Stem Cell Centre; Lund University; Lund Sweden
| | - M. Fex
- Department of Clinical Sciences in Malmö; Unit of Molecular Metabolism; Lund University Diabetes Centre; Lund University; Malmö Sweden
- Clinical Research Center; Lund University; Malmö Sweden
- Malmö University Hospital; Lund University; Malmö Sweden
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Coad J, Fugett J, Bennet H, Castillo-Saenz L, Garza-Lea J. In Vivo LibrataTM Endometrial Ablation Device Performance Study in Women Scheduled for Elective Hysterectomy. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.108] [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: 11/30/2022]
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Tikkanen R, Saukkonen T, Fex M, Bennet H, Rautiainen MR, Paunio T, Koskinen M, Panarsky R, Bevilacqua L, Sjöberg RL, Tiihonen J, Virkkunen M. Correction: Influence of a HTR2B Stop Codon on Glucagon Homeostasis and Glucose Excursion in Non-Diabetic Men. Exp Clin Endocrinol Diabetes 2016; 124:e5. [PMID: 27576206 DOI: 10.1055/s-0036-1585513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- R Tikkanen
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland.,Research and Development, Rinnekoti Foundation, Espoo, Finland
| | - T Saukkonen
- Children's Hospital, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland.,Novo Nordisk Farma Oy, Espoo, Finland
| | - M Fex
- Department of Clinical Science, Lund University Diabetes Center, Scania University Hospital, Malmö, Sweden
| | - H Bennet
- Department of Clinical Science, Lund University Diabetes Center, Scania University Hospital, Malmö, Sweden
| | - M-R Rautiainen
- National Institute for Health and Welfare, Helsinki, Finland
| | - T Paunio
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland.,National Institute for Health and Welfare, Helsinki, Finland
| | - M Koskinen
- Oy Aava Development Ltd., Helsinki, Finland
| | - R Panarsky
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - L Bevilacqua
- Department of Psychiatry, New York University School of Medicine, New York, NY, USA
| | - R L Sjöberg
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå Sweden
| | - J Tiihonen
- National Institute for Health and Welfare, Helsinki, Finland.,Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå Sweden.,Department of Forensic Psychiatry, University of Eastern Finland, Niuvanniemi Hospital, Kuopio, Finland.,Department of Forensic Psychiatry, University of Eastern Finland, Niuvanniemi Hospital, Kuopio, Finland
| | - M Virkkunen
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland
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Tikkanen R, Saukkonen T, Fex M, Bennet H, Rautiainen MR, Paunio T, Koskinen M, Panarsky R, Bevilacqua L, Sjöberg RL, Tiihonen J, Virkkunen M. Influence of a HTR2B Stop Codon on Glucagon Homeostasis and Glucose Excursion in Non-Diabetic Men. Exp Clin Endocrinol Diabetes 2016; 124:529-534. [PMID: 27437919 DOI: 10.1055/s-0042-109263] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Limited data are available about the role of the serotonin 2B (5-HT2B) receptor in the function of human islets. This study aimed to test whether the 5-HT2B receptor contributes to glucose, insulin, and glucagon homeostasis in humans, utilizing a hereditary loss-of-function gene mutation in the receptor, which causes a 50% reduction in the production of the receptor protein in heterozygotes. This clinical study enrolled participants recruited by newspaper advertisements and from mental status examinations. A cohort of participants from a young Finnish founder population composed of 68 non-diabetic males with a mean age of 30 was divided into groups for comparison based on being a 5-HT2B receptor loss-of-function gene mutation (HTR2B Q20*) heterozygote carrier (n=11) or not (n=57). Serum levels of glucose, insulin, and glucagon were measured in a 5 h oral glucose tolerance test using a 75 g glucose challenge. Insulin resistance, insulin sensitivity, and beta cell activity were calculated using the homeostasis model assessment (HOMA2) and whole body insulin sensitivity index (WBISI), as well as the ratio of glucagon to insulin was noted. The areas under the curves (AUCs) were also determined. Concentrations of the serotonin metabolite 5-hydroxyindoleacetic acid (5-HIAA) were measured in cerebrospinal fluid (CSF). Covariate adjusted mean score comparisons were applied. Lower glucagon secretion and decreased glucose excursion were observed among HTR2B Q20* carriers as compared with individuals who were homozygotes for the wild-type Q20 allele (controls). No differences in insulin secretion, beta cell activity, insulin resistance, or insulin sensitivity were observed. The glucagon to insulin ratio differed between the HTR2B Q20* carriers and controls. CSF levels of 5-HIAA were similar between groups. Our findings indicate that the 5-HT2B receptor may contribute to the regulation of human glucagon and glucose homeostasis and the interplay between glucagon and insulin secretion.
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Affiliation(s)
- R Tikkanen
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland
| | - T Saukkonen
- Children's Hospital, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland
| | - M Fex
- Department of Clinical Science, Lund University Diabetes Center, Scania University Hospital, Malmö, Sweden
| | - H Bennet
- Department of Clinical Science, Lund University Diabetes Center, Scania University Hospital, Malmö, Sweden
| | - M-R Rautiainen
- National Institute for Health and Welfare, Helsinki, Finland
| | - T Paunio
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland
| | - M Koskinen
- Oy Aava Development Ltd., Helsinki, Finland
| | - R Panarsky
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - L Bevilacqua
- Department of Psychiatry, New York University School of Medicine, New York, NY, USA
| | - R L Sjöberg
- Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå Sweden
| | - J Tiihonen
- National Institute for Health and Welfare, Helsinki, Finland
| | - M Virkkunen
- Department of Psychiatry, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland
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Bennet H, Balhuizen A, Medina A, Dekker Nitert M, Ottosson Laakso E, Essén S, Spégel P, Storm P, Krus U, Wierup N, Fex M. Altered serotonin (5-HT) 1D and 2A receptor expression may contribute to defective insulin and glucagon secretion in human type 2 diabetes. Peptides 2015. [PMID: 26206285 DOI: 10.1016/j.peptides.2015.07.008] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Islet produced 5-hydroxy tryptamine (5-HT) is suggested to regulate islet hormone secretion in a paracrine and autocrine manner in rodents. Hitherto, no studies demonstrate a role for this amine in human islet function, nor is it known if 5-HT signaling is involved in the development of beta cell dysfunction in type 2 diabetes (T2D). To clarify this, we performed a complete transcriptional mapping of 5-HT receptors and processing enzymes in human islets and investigated differential expression of these genes in non-diabetic and T2D human islet donors. We show the expression of fourteen 5-HT receptors as well as processing enzymes involved in the biosynthesis of 5-HT at the mRNA level in human islets. Two 5-HT receptors (HTR1D and HTR2A) were over-expressed in T2D islet donors. Both receptors (5-HT1d and 5-HT2a) were localized to human alpha, beta and delta cells. 5-HT inhibited both insulin and glucagon secretion in non-diabetic islet donors. In islets isolated from T2D donors the amine significantly increased release of insulin in response to glucose. Our results suggest that 5-HT signaling participates in regulation of overall islet hormone secretion in non- diabetic individuals and over-expression of HTR1D and HTR2A may either contribute to islet dysfunction in T2D or arise as a consequence of an already dysfunctional islet.
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Affiliation(s)
- H Bennet
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - A Balhuizen
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - A Medina
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - M Dekker Nitert
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden; Royal Brisbane Clinical School, UQ Centre for Clinical Research, The University of Queensland, Herston, QLD 4029, Australia
| | - E Ottosson Laakso
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - S Essén
- The Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Getingevägen 60, SE-22241, Lund, Sweden
| | - P Spégel
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - P Storm
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - U Krus
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - N Wierup
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden
| | - M Fex
- Department of Clinical Science, Lund University Diabetes Centre, Scania University Hospital, Entrance 72, Clinical Research Centre House 91, Jan Waldenströmsgata 35, SE-20502, Malmö, Sweden.
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Fifi JT, Brockington C, Narang J, Leesch W, Ewing SL, Bennet H, Berenstein A, Chong J. Clopidogrel resistance is associated with thromboembolic complications in patients undergoing neurovascular stenting. AJNR Am J Neuroradiol 2013; 34:716-20. [PMID: 23194833 PMCID: PMC7964502 DOI: 10.3174/ajnr.a3405] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Accepted: 09/17/2012] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND PURPOSE Antiplatelet drug resistance has been associated with thromboembolic complications in patients after coronary stent placement. It has not been well-studied in patients who have neurovascular stent-placement procedures. This study aimed to analyze the relationship between antiplatelet drug resistance and neurovascular stent-placement complications. MATERIALS AND METHODS A prospective data base of all patients treated at our institution was used to identify patients with neurovascular stent-placement procedures. During a 4.5-year period, all patients undergoing neurovascular stent placement were evaluated for aspirin and clopidogrel resistance by using the VerifyNow assay. During an observational phase, all patients received 75 mg of clopidogrel and aspirin (group A). During the intervention phase (group B), patients were given additional clopidogrel on the basis of the clopidogrel resistance assay. We assessed the development of thromboembolic complications within 30 days of the procedure in patients who were resistant-versus-nonresistant to clopidogrel. RESULTS Of 96 patients who had neurovascular stent placement, 5.2% were resistant to aspirin and 36.5% were resistant to clopidogrel. Periprocedural thromboembolic complications were seen in 7 patients (7.3%). In a multivariate logistic regression model, clopidogrel resistance, higher diastolic blood pressure, and lack of statin use were significantly associated with periprocedural thromboembolic complication. There was a nonsignificant decrease in thromboembolic complications in patients whose clopidogrel dosage was tailored to the assay. CONCLUSIONS In our series, clopidogrel resistance was associated with increased periprocedural thromboembolic complications from neurovascular stent-placement procedures. Targeting the clopidogrel dose to platelet inhibition assays may improve clinical outcomes and requires further study.
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Affiliation(s)
- J T Fifi
- Center for Endovascular Surgery, Hyman Newman Institute for Neurology and Neurosurgery, Department of Neurology, St. Luke's Roosevelt Hospital Center, New York, NY 10019, USA.
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Portelance L, Chao KS, Grigsby PW, Bennet H, Low D. Intensity-modulated radiation therapy (IMRT) reduces small bowel, rectum, and bladder doses in patients with cervical cancer receiving pelvic and para-aortic irradiation. Int J Radiat Oncol Biol Phys 2001; 51:261-6. [PMID: 11516876 DOI: 10.1016/s0360-3016(01)01664-9] [Citation(s) in RCA: 317] [Impact Index Per Article: 13.8] [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: 11/30/2022]
Abstract
PURPOSE The emergent use of combined modality approach (chemotherapy and radiation therapy) for the treatment of patients with cervical cancer is associated with significant gastrointestinal and genitourinary toxicity. Intensity-modulated radiation therapy (IMRT) has the potential to deliver adequate dose to the target structures while sparing the normal organs and could also allow for dose escalation to grossly enlarged metastatic lymph node in pelvic or para-aortic area without increasing gastrointestinal/genitourinary complications. We conducted a dosimetric analysis to determine if IMRT can meet these objectives in the treatment of cervical cancer. METHODS AND MATERIALS Computed tomography scan studies of 10 patients with cervical cancer were retrieved and used as anatomic references for planning. Upon the completion of target and critical structure delineation, the imaging and contour data were transferred to both an IMRT planning system (Corvus, Nomos) and a three-dimensional planning system (Focus, CMS) on which IMRT as well as conventional planning with two- and four-field techniques were derived. Treatment planning was done on these two systems with uniform prescription, 45 Gy in 25 fractions to the uterus, the cervix, and the pelvic and para-aortic lymph nodes. Normalization was done to all IMRT plans to obtain a full coverage of the cervix with the 95% isodose curve. Dose-volume histograms were obtained for all the plans. A Student's t test was performed to compute the statistical significance. RESULTS The volume of small bowel receiving the prescribed dose (45 Gy) with IMRT technique was as follows: four fields, 11.01 +/- 5.67%; seven fields, 15.05 +/- 6.76%; and nine fields, 13.56 +/- 5.30%. These were all significantly better than with two-field (35.58 +/- 13.84%) and four-field (34.24 +/- 17.82%) conventional techniques (p < 0.05). The fraction of rectal volume receiving a dose greater than the prescribed dose was as follows: four fields, 8.55 +/- 4.64%; seven fields, 6.37 +/- 5.19%; nine fields, 3.34 +/- 3.0%; in contrast to 84.01 +/- 18.37% with two-field and 46.37 +/- 24.97% with four-field conventional technique (p < 0.001). The fractional volume of bladder receiving the prescribed dose and higher was as follows: four fields, 30.29 +/- 4.64%; seven fields, 31.66 +/- 8.26%; and nine fields, 26.91 +/- 5.57%. It was significantly worse with the two-field (92.89 +/- 35.26%) and with the four-field (60.48 +/- 31.80%) techniques (p < 0.05). CONCLUSION In this dosimetric study, we demonstrated that with similar target coverage, normal tissue sparing is superior with IMRT in the treatment of cervical cancer.
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Affiliation(s)
- L Portelance
- Department of Radiology, Radiation Oncology Center, Mallinckrodt Institute of Radiology, Washington University Medical Center, St. Louis, MO 63110, USA
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Portelance L, Chao C, Grigsby P, Bennet H. 123 Intensity modulated radiation therapy (imrt) may reduce small bowel, rectum, and bladder complications in patients with cervical cancer treated to the pelvis and paraaortic area. Int J Radiat Oncol Biol Phys 1999. [DOI: 10.1016/s0360-3016(99)90141-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bennet H. The New Drainage of Mentone. West J Med 1884. [DOI: 10.1136/bmj.1.1205.244-a] [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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Bennet H. Remarks on the Balearic Islands as a Health-Resort. West J Med 1880; 2:537-9. [DOI: 10.1136/bmj.2.1031.537] [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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Bennet H. School-headache from Over-study versus Defective Ventilation. West J Med 1880. [DOI: 10.1136/bmj.2.1030.530] [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: 11/03/2022]
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Bennet H. Metrorrhagia, & its Treatment by Plugging the Cervical Canal. West J Med 1879; 2:122-3. [DOI: 10.1136/bmj.2.969.122] [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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Bennet H. The Marriage of Consumptives. West J Med 1871. [DOI: 10.1136/bmj.1.533.295] [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: 11/03/2022]
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Bennet H. Inflammatory Disease of the Cervix Uteri a Cause of Abortion. West J Med 1847. [DOI: 10.1136/bmj.s1-11.21.587] [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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