1. Department of Gastroenterology Fukushima Medical University School of Medicine Fukushima Japan
2. Department of Gastroenterology Sanno Medical Center, International University of Health and Welfare Minatoku Japan
3. Department of Gastroenterology and Metabology Ehime University Graduate School of Medicine Ehime Japan
4. Division of Gastroenterology Department of Medicine Kurume University School of Medicine Kurume Japan
5. Department of Internal Medicine Keio University School of Medicine Tokyo Japan
6. Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
7. Center for Gastroenterology Teine Keijinkai Hospital Sapporo Japan
8. Department of Medicine, Division of Gastroenterology and Hepatology Shinshu University School of Medicine Matsumoto Japan
9. Department of Hepatology Toranomon Hospital Minatoku Japan
10. Department of Gastroenterology and Hepatology Third Hospital, Jikei University School of Medicine Komae Japan
11. Department of Pediatric Hepatology and Gastroenterology Saiseikai Yokohamashi Tobu Hospital Yokohama Japan
12. Department of Medicine Teikyo University School of Medicine Tokyo Japan