1. The Research Center for Hepatitis and Immunology; National Center for Global Health and Medicine; Ichikawa Japan
2. Department of Gastroenterology; Aichi Medical University School of Medicine; Nagakute Japan
3. Department of Internal Medicine; Graduate School of Medicine, University of Tokyo; Tokyo Japan
4. Clinical Research Center; NHO Nagasaki Medical Center; Nagasaki Japan
5. Department of Gastroenterology; Sapporo Kosei General Hospital; Sapporo
6. First Department of Internal Medicine; Iwate Medical University; Morioka Japan
7. Department of Gastroenterology; Yamagata University School; Yamagata Japan
8. Department of Hepatology; Toranomon Hospital; Tokyo Japan
9. Department of Medicine and Clinical Oncology; Chiba University, Graduate School of Medicine; Chiba Japan
10. Division of Gastroenterology and Hepatology; Musashino Red Cross Hospital; Tokyo Japan
11. Department of Medicine; Shinshu University School of Medicine; Matsumoto Japan
12. Department of Gastroenterology and Hepatology; Juntendo University Shizuoka Hospital; Shizuoka Japan
13. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Japan
14. National Hospital Organization Osaka National Hospital; Osaka Japan
15. Department of Gastroenterology and Hepatology; Okayama University Graduate School of Medicine; Okayama Japan
16. Department of Gastroenterology; Ehime University Graduate School of Medicine; Toon Japan
17. First Department of Internal Medicine; University Hospital, Faculty of Medicine, University of the Ryukyu; Okinawa Japan
18. AIDS Clinical Center; National Center for Global Health and Medicine; Tokyo Japan
19. Nagoya City University Graduate School of Medical Sciences; Nagoya Japan