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 Hiroshima Japan
4. Department of Gastroenterology Japanese Red Cross Asahikawa Hospital Asahikawa Hokkaido Japan
5. Center for Liver‐Biliary‐Pancreatic Disease Matsuyama Red Cross Hospital Matsuyama Ehime Japan
6. Department of Gastroenterology Japanese Red Cross Ishinomaki Hospital Ishinomaki Miyagi Japan
7. Department of Gastroenterology Masuda Red Cross Hospital Masuda Shimane Japan
8. Department of Gastroenterology Japanese Red Cross Okayama Hospital Okayama Okayama Japan
9. Department of Gastroenterology Japanese Red Cross Kyoto Daiichi Hospital Kyoto Japan
10. Department of Gastroenterology Japanese Red Cross Akita Hospital Akita 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 Mie Japan
14. Department of Gastroenterology Japanese Red Cross Medical Center Tokyo Japan
15. Department of Gastroenterology Japanese Red Cross Matsue Hospital Matsue Shimane Japan