1. Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
2. Center for Innovative Clinical Medicine Okayama University Hospital Okayama Japan
3. Department of Gastroenterology Kagawa Prefectural Central Hospital Kagawa Japan
4. Department of Gastroenterology and Hepatology Kurashiki Central Hospital Okayama Japan
5. Department of Gastroenterology Mitoyo General Hospital Kagawa Japan
6. Department of Gastrointestinal Oncology Osaka International Cancer Institute Osaka Japan
7. Division of Hereditary Tumors, Department of Genetic Oncology Osaka International Cancer Institute Osaka Japan
8. Department of Gastroenterology Ishikawa Prefectural Central Hospital Ishikawa Japan
9. Department of Internal Medicine Japanese Red Cross Mihara Hospital Hiroshima Japan
10. Department of Gastroenterology and Hepatology Kohnodai Hospital, National Center for Global Health and Medicine Chiba Japan
11. Department of Gastroenterology Onomichi Municipal Hospital Hiroshima Japan
12. Department of Endoscopy Fukushima Medical University Hospital Fukushima Japan
13. Department of Internal Medicine Sumitomo Besshi Hospital Ehime Japan
14. Department of Gastroenterology Osaka City General Hospital Osaka Japan
15. Department of Gastroenterology The University of Tokyo Hospital Tokyo Japan
16. Department of Gastroenterology National Hospital Organization Fukuyama Medical Center Hiroshima Japan
17. Department of Internal Medicine Tsuyama Chuo Hospital Okayama Japan
18. Department of Internal Medicine Teraoka Memorial Hospital Hiroshima Japan
19. Department of Gastroenterology National Hospital Organization Iwakuni Clinical Center Yamaguchi Japan
20. Department of Internal Medicine Okayama City Hospital Okayama Japan
21. Department of Internal Medicine Japanese Red Cross Society Himeji Hospital Hyogo Japan
22. Department of Gastroenterology Iizuka Hospital Fukuoka Japan
23. Center for Clinical Research Hamamatsu University School of Medicine Shizuoka Japan
24. Department of General Internal Medicine 2 Kawasaki Medical School General Medical Center Okayama Japan