1. Gastroenterological Center Yokohama City University Medical Center Yokohama Japan
2. Department of Gastroenterology, Internal Medicine Kitasato University School of Medicine Sagamihara Japan
3. Gastroenterology Center Ehime Prefectural Central Hospital Matsuyama Japan
4. Hepatobiliary and Pancreatic Medical Oncology Kanagawa Cancer Center Hospital Yokohama Japan
5. Department of Gastroenterology and Hepatology Ogaki Municipal Hospital Ogaki Japan
6. Department of Gastroenterology Himeji Red Cross Hospital Himeji Hyogo Japan
7. Department of Gastroenterology Shonan Fujisawa General Hospital Fujisawa Japan
8. Department of Gastroenterology Asahi General Hospital Asahi Japan
9. Division of Gastroenterology and Hepatology Nippon Medical School Tokyo Japan
10. Department of Gastroenterology Okayama City Hospital Okayama Japan
11. Second Department of Internal Medicine Osaka Medical College Takatsuki Japan
12. Division of Gastroenterology and Hepatology, Department of Internal Medicine St. Marianna University School of Medicine Kawasaki Japan
13. Division of Gastroenterology and Hepatology, Department of Internal Medicine Tokai University School of Medicine Isehara Japan
14. Department of Gastroenterology Tokushima Prefectural Central Hospital Tokushima Japan
15. Department of Gastroenterology and Neurology, Faculty of Medicine Kagawa University Miki Kagawa Japan
16. Department of Gastroenterology Saiseikai Niigata Hospital Niigata Japan
17. Department of Gastroenterology Toyama University Hospital Toyama Japan
18. Department of Pathology Keio University School of Medicine Tokyo Japan
19. Faculty of Nursing Gifu Kyoritsu University Ogaki Japan
20. Department of Gastroenterology Yokohama City University Hospital Yokohama Japan