1. Department of Surgery; Teikyo University School of Medicine; 2-11-1, Kaga-cho Itabashi Tokyo 173 Japan
2. Department of Surgical Oncology and Gastroenterological Surgery; Sapporo Medical University Graduate School of Medicine; Sapporo Japan
3. Department of Emergency and Critical Care Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
4. Department of Hemodialysis and Surgery, Clinical Research Center Kaken Hospital; International University of Health and Welfare; Chiba Japan
5. General Internal Medicine; Japanese Red Cross Society Nagoya Daini Hospital; Nagoya Japan
6. Department of Gastroenterology; Ogaki Municipal Hospital; Ogaki Japan
7. Department of Surgery; Kumamoto Regional Medical Center; Kumamoto Japan
8. Department of Surgery; National Hospital Organization Sendai Medical Center; Sendai Japan
9. Critical Care and Emergency Center; Yokohama City University Medical Center; Yokohama Japan
10. Division of Gastroenterology; Tohoku University Graduate School of Medicine; Sendai Japan
11. Department of Healthcare Economics and Quality Management; Kyoto University Graduate School of Medicine; Kyoto Japan
12. Department of Hepatobiliary Pancreatic and Transplant Surgery; Mie University Graduate School of Medicine; Mie Japan
13. Department of Surgery; Kinki University School of Medicine; Osaka Japan
14. Department of Radiology, Graduate School of Medical Science; Kanazawa University; Ishikawa Japan
15. Department of Emergency and Critical Care Medicine; Kimitsu Chuo Hospital; Chiba Japan