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