1. Department of Gastroenterology Fukushima Medical University School of Medicine Fukushima Japan
2. Akasaka Sanno Medical Center International University of Health and Welfare Tokyo Japan
3. Department of Gastroenterology and Metabology Ehime University Graduate School of Medicine Ehime Japan
4. Department of Medicine Kurume University School of Medicine Kurume Japan
5. Department of Medicine, Division of Gastroenterology and Hepatology Shinshu University School of Medicine Matsumoto Japan
6. Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences Okayama Japan
7. Department of Internal Medicine Keio University School of Medicine Tokyo Japan
8. Center for Gastroenterology Teine Keijinkai Hospital Sapporo Japan
9. Department of Hepatology Toranomon Hospital Kawasaki Japan
10. Department of Pediatric Hepatology and Gastroenterology Saiseikai Yokohamashi Tobu Hospital Yokohama Japan
11. Department of Gastroenterology and Hepatology The Third Hospital of Jikei University School of Medicine Tokyo Japan
12. Department of Human Pathology Kanazawa University Graduate School of Medicine Kanazawa Japan
13. Second Department of Internal Medicine Faculty of Medical Sciences University of Fukui Fukui Japan
14. Department of Hepatology Sendai Kousei Hospital Sendai Japan
15. Department of Gastroenterology and Hepatology Juntendo University Shizuoka Hospital Izunokuni Japan
16. Department of Pathology and Laboratory Medicine Institute of Biomedical Sciences Tokushima University Graduate School Takushima Japan
17. Department of Medicine Teikyo University School of Medicine Tokyo Japan