1. Department of Internal Medicine, Division of Gastroenterology and Hepatology; Nippon Medical School; Tokyo Japan
2. The Core Research Facilities for Basic Science; The Jikei University School of Medicine; Tokyo Japan
3. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Japan
4. Department of Hepatology; Kagawa Prefectural Central Hospital; Takamatsu Japan
5. Department of Gastroenterology; Nippon Medical School Chiba Hokusoh Hospital; Inzai Japan
6. Gastroenterology Center; Ehime Prefectural Central Hospital; Matsuyama Japan
7. Department of Gastroenterology; Okayama Saiseikai General Hospital; Okayama Japan
8. Department of Gastroenterology, Internal Medicine; Kitasato University School of Medicine; Sagamihara Japan
9. Department of Internal Medicine; St. Marianna University School of Medicine; Kawasaki Japan
10. Department of Internal Medicine, Division of Gastroenterology and Hepatology; Tokyo Metropolitan Bokutoh Hospital; Tokyo Japan
11. Department of Hepatology; Saiseikai Niigata Daini Hospital; Niigata Japan
12. Department of Internal Medicine, Division of Gastroenterology and Hepatology; Shinmatusdo Central General Hospital; Matsudo Japan
13. Center of Gastroenterology; Teine Keijinkai Hospital; Sapporo Japan
14. Department of Gastroenterology and Hepatology; Takamatsu Red Cross Hospital; Takamatsu Japan
15. Department of Internal Medicine, Division of Gastroenterology and Hepatology; Otakanomori Hospital; Kashiwa Japan
16. Department of Virology and Liver Unit; Nagoya City University; Nagoya Japan
17. Department of Internal Medicine, Division of Gastroenterology; Kikkoman General Hospital; Noda Japan