1. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
2. Division of Gastroenterology, Department of Internal Medicine, CHA Ilsan Medical Center, CHA University School of Medicine, Ilsan, Jeollabuk-do, Korea
3. Department of Internal Medicine, Seoul National University Hospital Gangnam Center, Seoul, Korea
4. Department of Internal Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Gangwon-do, Korea
5. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Chungcheongnam-do, Korea
6. Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Gyeonggi-do, Korea
7. Division of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
8. Division of Gastroenterology, Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
9. Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
10. Digestive Disease Center, CHA Gangnam Medical Center, CHA University, Seoul, Korea
11. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
12. Department of Gastroenterology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea
13. Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Gyeonggi-do, Korea
14. Department of Internal Medicine and Digestive Disease Research Institute, Wonkwang University School of Medicine, Iksan, Jeollabuk-do, Korea
15. Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
16. Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
17. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
18. Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
19. Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
20. Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University Cheonan, Hospital, Cheonan, Chungcheongnamdo, Korea
21. Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
22. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
23. Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, Korea
24. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
25. Institute of Medical Sciences, Tzu Chi University, and Department of Public Health, College of Medicine, Tzu Chi University, Hualien City, Taiwan
26. Center of Excellence on Neurogastroenterology and Motility, Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
27. Departments of Gastroenterology, Sanjay Gandhi Postgraduate Institute of Medical Science, Lucknow, India
28. Institute of Digestive Disease, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, China
29. Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
30. Division of Gastroenterology and Hepatology, University Medicine Cluster, National University Hospital, Singapore
31. Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
32. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
33. Division of Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
34. Department of Gastroenterology, Ajou University School of Medicine, Suwon, Gyeonggi-do, Korea