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Visnes ES, Hallan A, Bomme M, Holmberg D, Møller-Hansen J, Lagergren J, Ness-Jensen E. Prevalence and risk factors of gastro-oesophageal reflux symptoms among adolescents, the HUNT study. Scand J Gastroenterol 2024; 59:816-820. [PMID: 38756009 DOI: 10.1080/00365521.2024.2349646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/23/2024] [Indexed: 05/18/2024]
Abstract
BACKGROUND Gastro-oesophageal reflux disease (GORD) is recognized by symptoms of heartburn and acid regurgitation. These gastro-oesophageal reflux symptoms (GORS) are common in adults, but data from adolescents are sparse. This study aimed to assess the prevalence and risk factors of GORS among adolescents in a large and unselected population. METHODS This study was based on the Trøndelag Health Study (HUNT), a longitudinal series of population-based health surveys conducted in Nord-Trøndelag County, Norway. This study included data from Young-HUNT4 performed in 2017-2019, where all inhabitants aged 13-19 years were invited and 8066 (76.0%) participated. The presence of GORS (any or frequent) during the past 12 months and tobacco smoking status were reported through self-administrated questionnaires, whereas body mass index (BMI) was objectively measured. RESULTS Among 7620 participating adolescents reporting on the presence of GORS, the prevalence of any GORS and frequent GORS was 33.2% (95% confidence interval [CI] 32.2 - 34.3%) and 3.6% (95% CI 3.2 - 4.0%), respectively. The risk of frequent GORS was lower among boys compared to girls (OR 0.61; 95% CI 0.46 - 0.79), higher in current smokers compared to never smokers (OR 1.80; 95% CI 1.10 - 2.93) and higher among obese compared to underweight/normal weight adolescents (OR 2.50; 95% CI 1.70 - 3.66). CONCLUSION A considerable proportion of adolescents had GORS in this population-based study, particularly girls, tobacco smokers, and individuals with obesity, but frequent GORS was relatively uncommon. Measures to avoid tobacco smoking and obesity in adolescents may prevent GORS.
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Affiliation(s)
- Ellen Sylvia Visnes
- Department of Public Health and Nursing, HUNT Research Centre, NTNU, Norwegian University of Science and Technology, Levanger, Norway
| | | | - Maria Bomme
- Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Medical Gastroenterology S, Odense University Hospital, Odense, Denmark
| | - Dag Holmberg
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Jane Møller-Hansen
- Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Medical Gastroenterology S, Odense University Hospital, Odense, Denmark
| | - Jesper Lagergren
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
- School of Cancer and Pharmaceutical Sciences, King's College London, UK
| | - Eivind Ness-Jensen
- Department of Public Health and Nursing, HUNT Research Centre, NTNU, Norwegian University of Science and Technology, Levanger, Norway
- Department of Molecular Medicine and Surgery, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
- Medical Department, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway
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Hsu CT, Chen CC, Lee CT, Shieh TY, Wang HP, Wu MS, Lee JM, Wu JF, Tseng PH. Effect of peroral endoscopic myotomy on growth and esophageal motility for pediatric esophageal achalasia. J Formos Med Assoc 2024; 123:62-70. [PMID: 37598039 DOI: 10.1016/j.jfma.2023.08.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/10/2023] [Accepted: 08/07/2023] [Indexed: 08/21/2023] Open
Abstract
BACKGROUND/PURPOSE Peroral endoscopic myotomy (POEM), a novel minimally invasive treatment for esophageal achalasia, has been shown to be effective and safe for both adult and pediatric patients. However, studies on its application in children in Taiwan and its impact on growth and esophageal motility are lacking. METHODS We conducted a retrospective study on consecutive pediatric patients who were diagnosed with esophageal achalasia at National Taiwan University Hospital and underwent POEM during 2015-2022. Disease characteristics and treatment outcomes were analyzed. RESULTS Ten patients (age 16.9 ± 3.1 years), nine newly diagnosed and one previously treated with pneumatic dilatation, underwent POEM for achalasia (type I/II/III: 3/7/0). Average symptom duration before diagnosis was 19.4 ± 19.9 months, mean POEM procedure time was 83.6 ± 30.7 min, and clinical success (Eckardt score ≤3) was achieved in all patients. Eight patients experienced mild adverse events during POEM, but none required further endoscopic or surgical intervention. Over a mean follow-up period of 3.7 ± 1.6 years, mean Eckardt score decreased significantly from 5.7 ± 2.4 to 1.1 ± 0.7 (p = 0.0001). The BMI z-score also increased significantly after POEM (p = 0.023). Five patients received follow-up high-resolution impedance manometry (HRIM), and all had improved lower esophageal sphincter resting pressures (p = 0.011), body contractility, and bolus transit (p = 0.019). CONCLUSION POEM is an effective and safe treatment for pediatric achalasia in Taiwan. Early diagnosis and treatment with POEM may help to restore esophageal function and nutrition status in children.
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Affiliation(s)
- Chien-Ting Hsu
- Department of Pediatrics, National Taiwan University BioMedical Park Hospital, Hsinchu County, Taiwan
| | - Chien-Chuan Chen
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ching-Tai Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, E-DA Hospital/I-shou University, Kaohsiung, Taiwan
| | - Tze-Yu Shieh
- Division of Gastroenterology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan
| | - Hsiu-Po Wang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ming-Shiang Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Jang-Ming Lee
- Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Jia-Feng Wu
- Department of Pediatrics, National Taiwan University Children's Hospital, Taipei, Taiwan.
| | - Ping-Huei Tseng
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
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AlHussaini KI, Bin Abbas FB, Aljabri SF, Bayamin RA, Alfraih YA, Alsarar SA. Prevalence and Risk Factors for Gastroesophageal Reflux Disease (GERD) Among Visitors to the Health Center of Imam Mohammad Ibn Saud Islamic University. Cureus 2023; 15:e43936. [PMID: 37746515 PMCID: PMC10513474 DOI: 10.7759/cureus.43936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/22/2023] [Indexed: 09/26/2023] Open
Abstract
BACKGROUND A considerable majority of people have gastroesophageal reflux disease (GERD), a common gastrointestinal ailment. Globally, the prevalence of GERD has been rising, and it is linked to several risk factors. In this study, the incidence of GERD in a sample of the population was examined, along with the associated factors that may have an impact on it. METHODOLOGY The Gastroesophageal Reflux Disease Questionnaire (GERD-Q) was included in a self-administered survey given to 490 participants in a cross-sectional study to help determine who was more likely to have GERD. The questionnaire collected data on demographic elements, health-related traits, and past GERD diagnoses. RESULTS The findings revealed that 32.7% of the individuals had previously received a GERD diagnosis. Of the patients, 17.1% had a GERD-Q score of 8 or above, which indicates a higher likelihood of having GERD. Participants who had previously been diagnosed with GERD had a noticeably greater incidence of GERD, and females had a higher incidence of GERD than males. The frequency of caffeine consumption was substantially correlated with the occurrence of GERD. CONCLUSION Our study emphasizes the value of early GERD diagnosis and therapy to reduce problems and enhance the quality of life for those who are affected. According to our research, coffee use, gender, and prior GERD diagnoses are all linked to an increased risk of developing GERD. The GERD-Q is a trustworthy and proven tool for GERD diagnosis and might be used in clinical practice to recognize GERD patients and offer suitable treatment. Additional research is required to determine how additional risk variables affect the prevalence of GERD.
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Affiliation(s)
- Khalid I AlHussaini
- Department of Internal Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, SAU
| | - Fahad B Bin Abbas
- Department of Internal Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, SAU
| | - Shawq F Aljabri
- College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, SAU
| | - Rawan A Bayamin
- College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, SAU
| | - Yara A Alfraih
- College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, SAU
| | - Somiah A Alsarar
- College of Medicine, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, SAU
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Peng D, Tan Y, Li C, Lv L, Zhu H, Liang C, Li R, Liu D. Peroral Endoscopic Myotomy for Pediatric Achalasia: A Retrospective Analysis of 21 Cases With a Minimum Follow-Up of 5 Years. Front Pediatr 2022; 10:845103. [PMID: 35444970 PMCID: PMC9013798 DOI: 10.3389/fped.2022.845103] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/01/2022] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Peroral endoscopic myotomy (POEM) has shown promising short-term safety and efficacy in pediatric patients, while long-term outcomes are largely unknown. This study aimed to assess the clinical effects of POEM for pediatric achalasia who had a follow-up of at least 5 years. METHODS Pediatric patients from a single center who underwent a POEM between October 2011 and November 2016 were, respectively, collected and analyzed for long-term clinical outcomes. Patients were contacted to evaluate their current symptoms and encouraged repeat endoscopy and manometry. The clinical success, procedure-related parameters, adverse events, gastroesophageal reflux disease after POEM, and quality of life were evaluated. RESULTS A total of twenty-four patients who underwent POEM in our center were studied, with a mean age of 14.42 ± 2.65. Two of the 24 patients (8.3%) had previous treatment. The mean of the procedure time was 58.67 ± 19.10 min, 8.3% (2/24) of patients experienced perioperative adverse events. The current symptom scores were obtained from 21 patients at a mean follow-up of 92.57 months, the remainder were lost to follow-up after a mean of 38 months. Eckardt scores were significantly improved from preoperative baseline (preoperative 7.67 ± 1.62 vs. current 0.86 ± 1.28, P < 0.001). Long-term overall success was achieved in 95.8% of patients and none required retreatment for symptoms. 12.5% of patients were suffered from clinical reflux. 76.2% of patients expressed satisfaction with POEM. No severe adverse events were observed during the operation and the 5-years follow-up. CONCLUSION POEM resulted in successful symptomatic mitigation in a majority of pediatric patients after 5 years. A multi-center large-scale, prospective study is necessary for a confirmed conclusion.
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Affiliation(s)
- Dongzi Peng
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Yuyong Tan
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Chenjie Li
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Liang Lv
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Hongyi Zhu
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Chengbai Liang
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Rong Li
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
| | - Deliang Liu
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China.,Research Center of Digestive Disease, Central South University, Changsha, China
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Artanti D, Hegar B, Kaswandani N, Soedjatmiko, Prayitno A, Devaera Y, Vandenplas Y. The Gastroesophageal Reflux Disease Questionnaire in Adolescents: What Is the Best Cutoff Score? Pediatr Gastroenterol Hepatol Nutr 2019; 22:341-349. [PMID: 31338309 PMCID: PMC6629595 DOI: 10.5223/pghn.2019.22.4.341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/25/2018] [Accepted: 11/06/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND A self-assessment questionnaire, the GERD-Questionnaire (GERD-Q) was used to determine the prevalence of GERD in adolescents, describe the related factors, and determine the impact on quality of life (QoL). METHODS The incidence of GERD was evaluated using the GERD-Q in adolescents aged 12-18 years. The Pediatric Gastroesophageal Reflux Disease Symptom Questionnaire and Quality of Life Questionnaire (PGSQ-A) for adolescents were additionally administered. Some factors considered related to GERD were also evaluated. RESULTS The 520 adolescents were included. The prevalence of suspected GERD, according to a GERD-Q cutoff score of ≥7 was 32.9%, and those drinking soda were 1.7 times more likely to have GERD (95% confidence interval, 1.3-2.2; p<0.001). However, soda consumption was not a risk factor for development of GERD symptoms. Applying a cutoff score of ≥8, only 10.9% of the participants had a positive GERD score, but the association with soda consumption persisted. The median PGSQ-A score in subjects suspected of GERD was 8 (range 0-37) on weekends and 1 (range 0-17) during weekdays (p<0.001) compared to those not suspected of GERD, with a median of 2 (range 0-27) during weekends and 0 (range 0-10) during weekdays. Heartburn, regurgitation, and extraesophageal symptoms correlated significantly with QoL (p<0.001). CONCLUSION The prevalence of suspected GERD in adolescents was 32.9% or 10.9%, depending on the cutoff score used. There was a statistically significant difference in PGSQ-A scores between the subjects suspected or not of GERD, indicating an impaired QoL.
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Affiliation(s)
- Dian Artanti
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Badriul Hegar
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Nastiti Kaswandani
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Soedjatmiko
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Ari Prayitno
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Yoga Devaera
- Department of Child Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Yvan Vandenplas
- KidZ Health Castle, UZ Brussel, Vrije Universiteit Brussel, Brussels, Belgium
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Wu JF, Chung C, Tseng PH, Tsai IJ, Lin YC, Yang CH. Distal contractile to impedance integral ratio assist the diagnosis of pediatric ineffective esophageal motility disorder. Pediatr Res 2018; 84:849-853. [PMID: 30323346 DOI: 10.1038/s41390-018-0197-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/23/2018] [Accepted: 09/21/2018] [Indexed: 02/08/2023]
Abstract
OBJECTIVES We investigated the diagnostic utility of distal contractile integral (DCI) to esophageal impedance integral (EII) ratio (DCIIR) in high-resolution impedance manometry (HRIM) of ineffective esophageal motility (IEM) in children. METHODS We performed HRIM in 31 children with dysphagia, odynophagia, chronic vomiting, chest pain, or heartburn sensation. Based on the Chicago classification version 3.0, 20 subjects were diagnosed with IEM, and 11 subjects were normal. We analyzed the EII and DCIIR using MATLAB software. RESULTS The DCIIR calculated at the impedance cutoff at 1500 Ω (DCIIR1500) were significantly lower in IEM group than patients with normal motility (P = 0.007). Receiver operating characteristic (ROC) curve analysis showed that a DCIIR1500 < 0.009 mmHg/Ω best predicted IEM in children (P < 0.001). A DCIIR1500 < 0.008 mmHg/Ω is associated with significant body weight loss > 10% within 6 months in children. (P < 0.001). CONCLUSIONS The calculation of DCIIR1500 may assist the automatic analysis of bolus transit in HRIM study to diagnose IEM in children. An DCIIR1500 < 0.009 mmHg/Ω may assist in the diagnosis of IEM in children, and DCIIR1500 < 0.008 mmHg/Ω correlated with significant body weight loss. The calculation of DCIIR may serve as possible parameters for HRIM.
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Affiliation(s)
- Jia-Feng Wu
- Departments of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
| | - Chieh Chung
- Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Ping-Huei Tseng
- Departments of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - I-Jung Tsai
- Departments of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Yi-Cheng Lin
- Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Chia-Hsiang Yang
- Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
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Kubba H. The Role of Reflux in Childhood Otorhinolaryngological Disorders. CURRENT OTORHINOLARYNGOLOGY REPORTS 2018. [DOI: 10.1007/s40136-018-0179-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Okimoto E, Ishimura N, Morito Y, Mikami H, Shimura S, Uno G, Tamagawa Y, Aimi M, Oshima N, Kawashima K, Kazumori H, Sato S, Ishihara S, Kinoshita Y. Prevalence of gastroesophageal reflux disease in children, adults, and elderly in the same community. J Gastroenterol Hepatol 2015; 30:1140-6. [PMID: 25611309 DOI: 10.1111/jgh.12899] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/09/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIM The prevalence of gastroesophageal reflux disease (GERD) in adults is increasing in Japan as well as worldwide likely due to increasing obesity and the decreasing rate of Helicobacter pylori infection. However, data regarding the prevalence of GERD in children and adolescents in Japan are lacking. We investigated the prevalence of GERD in children, adults, and elderly living in the same community. METHODS We surveyed employees of Shimane University Hospital and a related facility and their families using the Gastroesophageal Reflux Disease Questionnaire (GerdQ) and Izumo Scale instruments with demographic information (age, sex, body height, and body weight) and information regarding concurrent medication being taken for GERD. The presence of GERD was defined as a GerdQ score of ≥ 8. RESULTS A total of 1859 subjects (771 males, 1088 females; 6-96 years old) were eligible for assessment. The prevalence of GERD in those under 20 years old was 4.4%, which was approximately one third of the rate in adults (11.6%). GERD prevalence was closely associated with obesity in adults, but not in subjects under 20 years old. GERD and other gastrointestinal symptoms frequently overlapped in both adults and younger subjects. CONCLUSION We found that the prevalence of GERD in subjects under 20 years of age was lower than that in adults and not associated with obesity. Nevertheless, it is important to be aware of symptoms such as heartburn and/or regurgitation when children and adolescents seek routine clinical care.
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Affiliation(s)
- Eiko Okimoto
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Norihisa Ishimura
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Yoshiya Morito
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Hironobu Mikami
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Shino Shimura
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Goichi Uno
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Yuji Tamagawa
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Masahito Aimi
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Naoki Oshima
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Kousaku Kawashima
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Hideaki Kazumori
- Department of Internal Medicine, Matsue Seikyo General Hospital, Matsue, Japan
| | - Shuichi Sato
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Shunji Ishihara
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
| | - Yoshikazu Kinoshita
- Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan
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Chen SCC. Questionnaire for child gastro-esophageal reflux disease. Pediatr Neonatol 2014; 55:419-20. [PMID: 25042476 DOI: 10.1016/j.pedneo.2014.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 05/19/2014] [Indexed: 11/18/2022] Open
Affiliation(s)
- Solomon Chih-Cheng Chen
- Department of Pediatrics, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chiayi, Taiwan; School of Medicine, Taipei Medical University, Taipei, Taiwan.
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