1. Department of Gastroenterological Surgery, Cancer Institute Ariake Hospital, Tokyo, Japan
2. Division of Gastroenterological and General Surgery, Department of Surgery, School of Medicine, Showa University, Tokyo, Japan
3. Department of Endoscopy, Kishiwada Tokusyukai Hospital, Osaka, Japan
4. Department of Endoscopy, NTT Medical Center Tokyo, Tokyo, Japan
5. Cardiovascular and Gastroenterological Surgery, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
6. Division of Gastric Surgery, Shizuoka Cancer Center, Shizuoka, Japan
7. Department of Gastric Surgery, National Cancer Center Hospital, Tokyo, Japan
8. Department of Advanced Medicine Research and Development Center for New Medical Frontiers, Kitasato University School of Medicine, Sagamihara, Japan
9. Department of Surgery, Kyorin University School of Medicine, Tokyo, Japan
10. Department of Gastroenterological Surgery, Ishikawa Prefectural Central Hospital, Ishikawa, Japan
11. Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
12. Department of Surgery, Keio University School of Medicine, Tokyo, Japan
13. Department of Surgery, Toyama Prefectural Central Hospital, Toyama, Japan
14. Department of Surgery, Tonan Hospital, Sapporo, Japan
15. Department of Clinical Trial Planning and Management, Cancer Institute Ariake Hospital, Tokyo, Japan
16. Department of Upper Gastrointestinal Surgery, Kitasato University School of Medicine, Sagamihara, Japan