1. Department of Surgery, Graduate School of MedicineOsaka University Osaka
2. Department of SurgeryNagasaki University Graduate School of Biomedical Sciences Nagasaki
3. Department of Surgery, Institute of GastroenterologyTokyo Women's Medical University
4. Department of Diagnostic Pathology, Graduate School of Medicine
5. Transplantation Center
6. Department of SurgeryNational Center for Global Health and Medicine Tokyo
7. Department of Gastroenterology and MedicineFukuoka University School of Medicine Fukuoka
8. Department of Hepato‐Pancreatic‐Biliary and Breast SurgeryEhime University Graduate School of Medicine Ehime
9. Department of MedicineShinshu University School of Medicine Matsumoto
10. Division of Hepato‐Biliary‐Pancreatic and Transplant Surgery, Department of Surgery, Graduate School of MedicineKyoto University Kyoto
11. Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health SciencesHiroshima University Hiroshima Japan