1. Department of Gastroenterology and Hepatology; Tokyo Medical University; 6-7-1 Nishishinjuku, Shinjuku-ku Tokyo 160-0023 Japan
2. Department of Medicine and Clinical Oncology; Graduate School of Medicine, Chiba University; Chiba Japan
3. Department of Surgery; Teikyo University School of Medicine; Tokyo Japan
4. Section of Hepatobiliary and Pancreatic Surgery; Washington University School of Medicine; St. Louis USA
5. Department of Surgery; Indiana University School of Medicine; Indianapolis IN USA
6. Department of Internal Medicine, Asan Medical Center; University of Ulsan; Seoul Korea
7. General and HPB Surgery; Loreto Nuovo Hospital; Naples Italy
8. Department of Emergency and Critical Care Medicine; Ichinomiya Municipal Hospital; Ichinomiya Japan
9. Clinical Research Center Kaken Hospital; International University of Health and Welfare; Ichikawa Japan
10. Department of Surgery; University of Heidelberg; Heidelberg Germany
11. Department of Surgery; Academic Medical Center; Amsterdam The Netherlands
12. Clinical Surgery; The University of Edinburgh; Edinburgh UK
13. Department of Surgical Oncology; Lilavati Hospital and Research Centre; Mumbai India
14. Center for Clinical Infectious Diseases; Jichi Medical University; Tochigi Japan
15. Department of Surgical Oncology and Gastroenterological Surgery; Sapporo Medical University School of Medicine; Sapporo Japan
16. Department of Surgery; Institute of Gastroenterology, Tokyo Women's Medical University; Tokyo Japan