1. Department of Internal Medicine Japanese Red Cross Society Himeji Hospital Himeji Japan
2. Department of Gastroenterology and Hepatology Musashino Red Cross Hospital Tokyo Japan
3. Department of Gastroenterology Hiroshima Red Cross Hospital and Atomic‐Bomb Survivors Hospital Hiroshima Japan
4. Department of Gastroenterology Japanese Red Cross Asahikawa Hospital Asahikawa Japan
5. Center for Liver‐Biliary‐Pancreatic Disease Matsuyama Red Cross Hospital Matsuyama Japan
6. Department of Gastroenterology Japanese Red Cross Ishinomaki Hospital Ishinomaki Japan
7. Department of Gastroenterology Masuda Red Cross Hospital Masuda Japan
8. Department of Gastroenterology Japanese Red Cross Okayama Hospital Okayama Japan
9. Department of Gastroenterology Japanese Red Cross Kyoto Daiichi Hospital Kyoto Japan
10. Department of Gastroenterology Japanese Red Cross Akita Hospital Akita Japan
11. Department of Gastroenterology and Hepatology Japanese Red Cross Osaka Hospital Osaka Japan
12. Department of Gastroenterology Japanese Red Cross Otsu Hospital Otsu Shiga Japan
13. Department of Hepatology Japanese Red Cross Ise Hospital Ise Japan
14. Department of Gastroenterology Japanese Red Cross Medical Center Tokyo Japan
15. Department of Gastroenterology Japanese Red Cross Matsue Hospital Matsue Japan