1. Department of Surgery; Teikyo University School of Medicine; 2-11-1, Kaga, Itabashi-ku Tokyo 173-8605 Japan
2. Section of Hepatobiliary and Pancreatic Surgery; Washington University in Saint Louis School of Medicine; Saint Louis MO USA
3. Department of Surgery; University of Cincinnati College of Medicine; Cincinnati OH USA
4. Department of Surgery; Indiana University School of Medicine; Indianapolis IN USA
5. Department of Surgery; Academic Medical Center; Amsterdam The Netherlands
6. Clinical Surgery; The University of Edinburgh; Edinburgh UK
7. Department of Surgery; University of Heidelberg; Heidelberg Germany
8. Clinical Research Center Kaken Hospital; International University of Health and Welfare; Ichikawa Japan
9. Department of Emergency and Critical Care Medicine; Ichinomiya Municipal Hospital; Ichinomiya Japan
10. Department of Surgery; Kitakyushu Municipal Yahata Hospital; Kitakyushu Japan
11. Center for Clinical Infectious Diseases; Jichi Medical University; Shimotsuke Tochigi Japan
12. Department of Surgery; Toho University Medical Center Ohashi Hospital; Tokyo Japan
13. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Japan
14. General Internal Medicine; Nagoya Daini Red Cross Hospital; Nagoya 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
17. Department of Gastroenterological Surgery; Fukuoka University School of Medicine; Fukuoka Japan
18. Department of Surgery; The University of Auckland; Auckland New Zealand
19. Department of Medicine and Clinical Oncology; Graduate School of Medicine Chiba University; Chiba Japan
20. Department of Radiology; Kanazawa University Graduate School of Medical Science; Kanazawa Japan
21. Department of Gastroenterology and Hepatology; Tokyo Medical University; Tokyo Japan
22. Department of Endoscopy and Ultrasound; Kawasaki Medical School; Okayama Japan
23. Hepatobiliary and Pancreatic Surgery, Nexus Surgical Associates; Mount Elizabeth Hospital; Singapore Singapore