1. Division of Lower GI Surgery, Department of Gastroenterological Surgery, Hyogo Medical University
2. Department of Gastrointestinal and Hepato-Billiary-Pancreatic Surgery, Nippon Medical School
3. Department of Gastrointestinal Surgery, Kanagawa Cancer Center
4. Department of Medical Oncology, Takarazuka City Hospital
5. Division of Gastrointestinal Oncology, Shizuoka Cancer Center
6. Department of Surgery, Gastroenterological Center, Yokohama City University Medical Center
7. Department of Medical Oncology, Osaka International Cancer Institute
8. Department of Gastroenterological Surgery, Yamagata Prefectural Central Hospital
9. Department of Medical Oncology, Ichinomiya Nishi Hospital
10. Department of Surgery, Kansai Rosai Hospital
11. Cancer Treatment Center, Kansai Medical University Hospital
12. Department of Medical Oncology, Kobe City Medical Center General Hospital
13. Department of Gastroenterological Surgery and Pediatric Surgery, Gifu Graduate School of Medicine
14. Department of Surgery, Ogaki Municipal Hospital
15. Department of Coloproctological Surgery, Juntendo University, Faculty of Medicine
16. Department of Surgery, Japanese Red Cross Society Himeji Hospital
17. Department of General Surgery, Kurashiki Central Hospital
18. Sysmex Inostics GmbH
19. Department of Biostatistics, Clinical Research Center, Shizuoka Cancer Center