1. Division of Gastroenterology; Department of Medicine; Kurume University School of Medicine; Kurume Japan
2. Liver Cancer Division; Research Center for Innovative Cancer Therapy; Kurume University; Kurume Japan
3. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Iwate Medical University; Morioka Japan
4. Department of Gastroenterology; Gifu University School of Medicine; Gifu Japan
5. Third Department of Internal Medicine; Nara Medical University; Nara Japan
6. NTT West Kyushu Hospital; Kumamoto Japan
7. Division of Gastroenterology; Department of Medicine; Showa University School of Medicine; Tokyo Japan