1. Department of Gastroenterology and Hepatology Ogaki Municipal Hospital, Ogaki Japan
2. Gastroenterology Center Ehime Prefectural Central Hospital Matsuyama Japan
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine Nippon Medical School Tokyo Japan
4. Department of Gastroenterology and Metabology Ehime University Graduate School of Medicine Matsuyama Japan
5. Center of Gastroenterology Teine Keijinkai Hospital Sapporo Japan
6. Department of Gastroenterology Saiseikai Niigata Daini Hospital Niigata Japan
7. Department of Hepatology Kagawa Prefectural Central Hospital Takamatsu Japan
8. Department of Gastroenterology Okayama City Hospital Okayama Japan
9. Department of Gastroenterology Asahi General Hospital Asahi Japan
10. Department of Gastroenterology Toyama University Hospital Toyama Japan
11. Division of Gastroenterology and Hepatology Otakanomori Hospital Kashiwa Japan
12. Department of Gastroenterology Tokushima Prefectural Central Hospital Tokushima Japan
13. Hepato‐biliary Center Matsuyama Red Cross Hospital Matsuyama Japan