1. Center for Clinical Infectious Diseases; Jichi Medical University; 3311-1, Yakushiji, Shimotsuke Tochigi 329-0431 Japan
2. Department of Surgery; University of Cincinnati College of Medicine; Cincinnati OH USA
3. Department of Surgery; Teikyo University School of Medicine; Tokyo Japan
4. Section of Hepatobiliary and Pancreatic Surgery; Washington University in Saint Louis School of Medicine; Saint Louis MO USA
5. Department of Surgery; Indiana University School of Medicine; Indianapolis IN USA
6. Clinical Research Center Kaken Hospital; International University of Health and Welfare; Ichikawa Japan
7. Department of Surgery; Toho University Medical Center Ohashi Hospital; Tokyo Japan
8. Department of Emergency and Critical Care Medicine; Ichinomiya Municipal Hospital; Ichinomiya Japan
9. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Japan
10. General Internal Medicine, Nagoya Daini Red Cross Hospital; Nagoya Japan
11. Department of Surgical Oncology and Gastroenterological Surgery; Sapporo Medical University School of Medicine; Sapporo Japan
12. Department of Surgery, Institute of Gastroenterology; Tokyo Women's Medical University; Tokyo Japan
13. Department of Surgery; The University of Auckland; Auckland New Zealand
14. First Department of Surgery; Agia Olga Hospital; Athens Greece
15. Hepatobiliary and Pancreatic Surgery, Nexus Surgical Associates; Mount Elizabeth Hospital; Singapore Singapore
16. Department of Internal Medicine, Asan Medical Center; University of Ulsan; Seoul Korea