1. Department of Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
2. Department of Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan
3. Transplantation Center, National Center for Child Health and Development, Tokyo, Japan
4. Department of Surgery, Shinshu University School of Medicine, Nagano, Japan
5. Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical, University, Tokyo, Japan
6. Department of Surgery, Division of Hepato-Biliary-Pancreatic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
7. Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
8. Department of Surgery, Hepato-Biliary-Pancreatic Surgery Division, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
9. Organ Transplantation Center, National Center for Child Health and Development, Tokyo, Japan
10. Department of Gastroenterological, Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
11. Department of Hepato-Pancreatic-Biliary and Breast Surgery, Ehime University Graduate School of Medicine, Ehime, Japan
12. Department of Internal Medicine and Gastroenterology, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
13. Department of Internal Medicine, Division of Gastroenterology, Kobe University Graduate School of Medicine, Kobe, Japan
14. Department of Gastroenterology & Hepatology, Faculty of Medicine, Saitama Medical University, Saitama, Japan
15. Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan