1. Department of Gastroenterology, Graduate School of Medicine The University of Tokyo Tokyo Japan
2. Department of Gastroenterology Tokyo Metropolitan Bokutoh Hospital Tokyo Japan
3. Department of Gastroenterology and Hepatology Kitano Hospital, Tazuke Kofukai Medical Research Institute Osaka Japan
4. Department of Gastroenterology Graduate School of Medicine, Nippon Medical School Tokyo Japan
5. Department of Gastroenterology St. Luke's International University Tokyo Japan
6. Department of Gastroenterology Hiroshima City Asa Citizens Hospital Hiroshima Japan
7. Department of Gastroenterology Saga‐Ken Medical Center Koseikan Saga Japan
8. Division of Gastroenterology and Hepatology, Department of Internal Medicine St Marianna University School of Medicine Kanagawa Japan
9. Department of Gastroenterology and Hepatology, Center for Digestive and Liver Diseases Nara City Hospital Nara Japan
10. Department of Gastroenterology Tokyo Shinagawa Hospital Tokyo Japan
11. Department of Endoscopy Nagoya University Hospital Aichi Japan
12. Department of Gastroenterology National Hospital Organization Kyoto Medical Center Kyoto Japan
13. Department of Gastroenterology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
14. Department of Gastroenterology Oita University Oita Japan
15. Department of Gastroenterology Fukuoka University Chikushi Hospital Fukuoka Japan
16. Department of Gastroenterology Chiba Hokusoh Hospital, Nippon Medical School Chiba Japan
17. Department of Gastroenterology Japanese Red Cross Shizuoka Hospital Shizuoka Japan
18. Division of Endoscopy and Ultrasonography, Department of Clinical Pathology and Laboratory Medicine Kawasaki Medical School General Medical Center Okayama Japan
19. Division of Gastroenterology, Graduate School of Medical and Dental Sciences Niigata University Niigata Japan
20. Department of Gastroenterology and Hepatology, Center for Digestive Disease and Division of Endoscopy University of Miyazaki Hospital Miyazaki Japan
21. Department of Gastroenterology University of Tsukuba Ibaraki Japan
22. Division of Endoscopic Center University of Tsukuba Hospital Ibaraki Japan
23. Department of Gastroenterology Toranomon Hospital Tokyo Japan
24. Emergency and Critical Care Center Saiseikai Yokohamashi Tobu Hospital Kanagawa Japan
25. Department of Emergency Medicine Fujita Health University Hospital Aichi Japan
26. Department of Gastroenterology Naha City Hospital Okinawa Japan
27. Department of Internal Medicine Tokyo Saiseikai Central Hospital Tokyo Japan
28. Department of Gastroenterological Endoscopy Tokyo Medical University Tokyo Japan
29. Department of Gastroenterology and Hepatology National Center for Global Health and Medicine Tokyo Japan