1. Department of Surgery, Nara Medical University , Kashihara , Japan
2. Sai Gastroenterology and Proctology Clinic , Fujiidera , Japan
3. Division of Endoscopy, Nara Medical University Hospital , Kashihara , Japan
4. Department of Inflammatory Bowel Disease, Yokohama Municipal Citizen’s Hospital , Yokohama , Japan
5. Department of Gastroenterological Surgery, Division of Inflammatory Bowel Disease Surgery, Hyogo Medical University , Nishinomiya , Japan
6. Department of Surgery, Fukuoka University Chikushi Hospital , Chikusino , Japan
7. Ooizumi Memorial Hospital , Shiroishi , Japan
8. Department of Surgery, Osaka Central Hospital , Osaka , Japan
9. Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, and Department of Gastroenterology, Department of Gastroenterology, Osaka Police Hospital , Osaka , Japan
10. Department of Therapeutics for Inflammatory Bowel Diseases, Osaka University Graduate School of Medicine , Osaka , Japan
11. Department of Surgery, Institute of Gastroenterology, Tokyo Women’s Medical University , Tokyo , Japan
12. Department of Surgery, Tohoku University Graduate School of Medicine , Sendai , Japan
13. Department of Surgical Oncology, The University of Tokyo , Tokyo , Japan
14. Nihonbashi Muromachi Mitsui Tower Midtown Clinic , Tokyo , Japan
15. Department of Internal Medicine, Toho University Sakura Medical Center , Chiba , Japan
16. Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University , Tokyo , Japan
17. Division of Gastroenterology, Aichi Medical University School of Medicine , Nagakute , Japan
18. Division of Gastroenterology, Department of Medicine, Jichi Medical University , Shimotsuke , Japan
19. Department of Surgery, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan, and Saitama Gastroenterological Clinic , Saitama , Japan
20. Gastroenterology and Endoscopy, Division of Metabolism and Biosystemic Science, Gastroenterology, and Hematology/Oncology, Department of Medicine, Asahikawa Medical University , Asahikawa , Japan
21. Second Department of Internal Medicine, Wakayama Medical University , Wakayama , Japan
22. Department of Gastroenterology, Graduate School of Medicine, Chiba University , Chiba , Japan
23. Department of Endoscopy and Medicine, Hiroshima University Hospital , Hiroshima , Japan
24. Department of Gastrointestinal and Pediatric Surgery, Mie University Graduate School of Medicine , Tsu , Japan
25. Center for Gastroenterology, Junshin Hospital , Kakogawa , Japan
26. Center for Advanced IBD Research and Treatment, Kitasato University Kitasato Institute Hospital , Tokyo , Japan
27. Gastrointestinal Endoscopy and IBD Center, Yoshida Hospital , Nara , Japan
28. Ginza Central Clinic , Tokyo , Japan
29. Department of Gastroenterology and Hepatology, Kyorin University School of Medicine , Tokyo , Japan