1. Department of Gastroenterology and Hepatology; Yamaguchi University Graduate School of Medicine; Yamaguchi Japan
2. Department of Gastroenterology; Yamaguchi Rosai Hospital; Yamaguchi Japan
3. Department of Oncology and Laboratory; Yamaguchi University Graduate School of Medicine; Yamaguchi Japan
4. Department of Hepatology; Osaka City University Graduate School of Medicine; Osaka Japan
5. Department of Gastroenterology, Graduate School of Medicine; Kanazawa University; Kanazawa Japan
6. Department of Gastroenterology; Ikeda Municipal Hospital; Osaka Japan
7. Center for Gastroenterology; Teine Keijinkai Hospital; Sapporo Japan
8. Division of Hepatobiliary and Pancreatic Disease; Department of Internal Medicine, Hyogo College of Medicine; Hyogo Japan
9. Ultrasound Imaging Center; Hyogo College of Medicine; Hyogo Japan
10. Department of Internal Medicine; Hiroshima City Hiroshima Citizens Hospital; Hiroshima Japan
11. Department of Gastroenterology and Hepatology; Mie University School of Medicine; Mie Japan
12. First Department of Internal Medicine, Faculty of Medicine; University of Yamanashi; Yamanashi Japan
13. First Department of Internal Medicine, Faculty of Medicine; University of the Ryukyus; Okinawa Japan