1. Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery; Graduate School of Medicine, The University of Tokyo; Tokyo Japan
2. Department of Surgery; Ageo Central General Hospital; Ageo, Saitama Japan
3. Department of Hepato-Biliary-Pancreatic Surgery; Hepatobiliary Center-Paul Brousse Hospital; Paris France
4. Department of Surgery; University of Pittsburgh; Pittsburgh USA
5. Tulane Transplant Institute, Tulane Medical Center, and Louisiana State University and Medical Center; New Orleans USA
6. Department of Surgery; Toho University School of Medicine; Tokyo Japan
7. Department of Surgery; Seoul National University Bundang Hospital; Seongnam-si South Korea
8. Department of Surgery; Washington University School of Medicine; St. Louis USA