1. Department of Gastroenterology and Hepatology Musashino Red Cross Hospital Tokyo Japan
2. Department of Gastroenterology and Hepatology Tokyo Medical and Dental University Tokyo Japan
3. Center for Liver‐Biliary‐Pancreatic Diseases Matsuyama Red Cross Hospital Matsuyama Ehime Japan
4. Department of Gastroenterology Japanese Red Cross Osaka Hospital Osaka Japan
5. Department of Gastroenterology Japanese Red Cross Otsu Hospital Shiga Japan
6. Department of Gastroenterology Japanese Red Cross Ise Hospital Ise Mie Japan
7. Department of Gastroenterology Japanese Red Cross Matsue Hospital Matsue Shimane Japan
8. Department of Gastroenterology Japanese Red Cross Kyoto Daiichi Hospital Kyoto Japan
9. Department of Gastroenterology Japanese Red Cross Ishinomaki Hospital Ishinomaki Miyagi Japan
10. Department of Gastroenterology Japanese Red Cross Akita Hospital Akita Japan
11. Department of Gastroenterology Japanese Red Cross Nagoya Daini Hospital Nagoya Japan
12. Department of Hepatology Japanese Red Cross Okayama Hospital Okayama Japan
13. Department of Gastroenterology Japanese Red Cross Maebashi Hospital Maebashi Gunma Japan
14. Department of Gastroenterology Japanese Red Cross Medical Center Tokyo Japan
15. Department of Gastroenterology Japanese Red Cross Takamatsu Hospital Takamatsu Kagawa Japan
16. Department of Gastroenterology Japanese Red Cross Masuda Hospital Masuda Shimane Japan
17. Department of Gastroenterology Hiroshima Red Cross Hospital & Atomic‐Bomb Survivors Hospital Hiroshima Japan
18. Department of Gastroenterology Japanese Red Cross Gifu Hospital Gifu Japan