1. Department of Surgery; Institute of Gastroenterology; Tokyo Women's Medical University; Tokyo Japan
2. Innovative Clinical Research Center; Kanazawa University; Kanazawa Japan
3. Department of Diagnostic Pathology; Kyoto University; Kyoto Japan
4. Department of Surgery; Graduate School of Medicine; Keio University; Tokyo Japan
5. Department of Surgery; Graduate School of Medicine; Kyoto University; Kyoto Japan
6. Department of Surgery; Graduate School of Medicine; Kyushu University; Fukuoka Japan
7. Department of Surgery; Graduate School of Medicine; Tohoku University; Miyagi Japan
8. Department of Surgery; Graduate School of Medicine; Hiroshima University; Hiroshima Japan
9. Department of Transplantation; National Center for Child Health and Development; Osaka Japan
10. Department of Surgery, Graduate School of Medicine; Osaka University; Osaka Japan