1. Gastroenterology Center Ehime Prefectural Central Hospital Kasuga‐cho Ehime Japan
2. Department of Nursing Gifu Kyoritsu University Ogaki Japan
3. Department of Internal Medicine Himeji Red Cross Hospital Hyogo Japan
4. Department of Gastroenterology and Metabology Ehime University Graduate School of Medicine Ehime Japan
5. Department of Gastroenterology Okayama City Hospital Okayama Japan
6. Department of Gastroenterology and Hepatology Kagawa University Kagawa Japan
7. Division of Gastroenterology and Hepatology, Department of Internal Medicine Nippon Medical School Tokyo Japan
8. Department of Hepatology Kagawa Prefectural Central Hospital Takamatsu Japan
9. Department of Gastroenterology Asahi General Hospital Asahi Japan
10. Department of Gastroenterology Osaka Medical College Osaka Japan
11. Center of Gastroenterology Teine Keijinkai Hospital Sapporo Japan
12. Department of Gastroenterology Saiseikai Niigata Hospital Niigata Japan
13. Department of Gastroenterology Toyama University Hospital Toyama Japan
14. Hepato‐biliary Center Matsuyama Red Cross Hospital Matsuyama Japan
15. Department of Gastroenterology and Hepatology Ogaki Municipal Hospital Gifu Japan
16. Department of Gastroenterology Takamatsu Red Cross Hospital Takamatsu Japan
17. Department of Internal Medicine, Division of Gastroenterology and Hepatology Hyogo College of Medicine Nishinomiya Japan
18. Department of Gastroenterology and Hepatology Saiseikai Maebashi Hospital Maebashi Japan
19. Department of Gastroenterology and Hepatology Kindai University Osaka Japan