1. Department of General Surgery, Graduate School of Medicine; Chiba University; Chiba Japan
2. Toyota Regional Medical Center; Toyota Japan
3. Division of Hepato-Biliary-Pancreatic Surgery; Shizuoka Cancer Center; Shizuoka Japan
4. Department of Surgery; Tohoku University Graduate School of Medicine; Sendai Japan
5. Department of Gastroenterological Surgery, Graduate School of Medicine; Yokohama City University; Yokohama Japan
6. Ebara Hospital; Tokyo Metropolitan Health and Medical Treatment Corporation; Tokyo Japan
7. Department of Surgery; Kurume University School of Medicine; Kurume Japan
8. Department of Hepatobiliary and Pancreatic Surgery; National Cancer Center Hospital; Tokyo Japan
9. Department of Surgery; Matsusaka Central General Hospital; Matsusaka Japan
10. Department of Surgical Oncology and Regulation of Organ Function; Miyazaki University School of Medicine; Miyazaki Japan
11. Division of Surgical Oncology, Department of Surgery; Nagoya University Graduate School of Medicine; Nagoya Japan
12. Department of Gastroenterological Surgery II, Division of Surgery; Hokkaido University Graduate School of Medicine; Sapporo Japan
13. Division of Digestive and General Surgery; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
14. Department of Surgery; Teikyo University School of Medicine; Tokyo Japan
15. Department of Gastroenterology, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
16. Department of Hepatobiliary and Pancreatic Oncology; National Cancer Center Hospital; Tokyo Japan
17. Department of Gastroenterology and Nephrology, Graduate School of Medicine; Chiba University; Chiba Japan
18. Miyagi Medical Check-up Plaza; Sendai Japan
19. Department of Medical Oncology; Kyorin University School of Medicine; Mitaka Japan
20. Department of Gastroenterology; Aichi Cancer Center Hospital; Nagoya Japan
21. Department of Radiology; Keio University School of Medicine; Tokyo Japan
22. Department of Radiology; Kyoto Prefectural University of Medicine; Kyoto Japan
23. Department of Pathology and Bioscience; Hirosaki University Graduate School of Medicine; Hirosaki Japan
24. Department of Pathology; Shizuoka Cancer Center; Shizuoka Japan
25. Department of Hemodialysis and Surgery, Chemotherapy Research Institute; International University of Health and Welfare; Ichikawa Japan