1. Department of Advanced Robotic and Endoscopic Surgery Fujita Health University Toyoake Japan
2. Department of Surgery Fujita Health University Toyoake Japan
3. Department of Gastrointestinal Surgery Kanazawa University Kanazawa Japan
4. Department of Gastrointestinal Surgery, Gastric Surgery Division Saitama Cancer Center Saitama Japan
5. Department of Surgery Toho University Sakura Medical Center Sakura Japan
6. Department of Gastroenterological Surgery New Tokyo Hospital Matsudo Japan
7. Department of Surgery Kyoto University Graduate School of Medicine Kyoto Japan
8. Weight Loss and Metabolic Surgery Center, Yotsuya Medical Cube Tokyo Japan
9. Gastric Surgery Division National Cancer Center Hospital East Kashiwa Japan
10. Department of Gastroenterological Surgery Graduate School of Medicine, Osaka University Suita Japan
11. Department of Upper Gastrointestinal Surgery Dokkyo Medical University Mibu‐machi Japan
12. Department of General Surgery・Center for Community Medicine Oita University Faculty of Medicine Yufu Japan
13. Department of Gastroenterological Surgery Nagoya City University Graduate School of Medical Sciences Nagoya Japan
14. Department of Gastrointestinal Surgery Tokyo Medical and Dental University Yushima Japan
15. Department of Lower Gastrointestinal Surgery Kitasato University School of Medicine Sagamihara Japan
16. Department of Surgery Japanese Red Cross Fukuoka Hospital Fukuoka Japan
17. Department of Gastroenterological Surgery Okayama University Hospital Okayama Japan
18. Department of Gastric Surgery The Cancer Institute Hospital of JFCR Tokyo Japan
19. Department of Gastroenterology and Minimally Invasive Surgery Juntendo University Hospital Tokyo Japan
20. Department of Surgery, Institute of Gastroenterology Tokyo Women's Medical University Tokyo Japan
21. The Cancer Institute Hospital of JFCR Tokyo Japan
22. Department of Surgery and Oncology Graduate School of Medical Sciences, Kyushu University Fukuoka Japan
23. Department of Gastroenterological and Pediatric Surgery Oita University Faculty of Medicine Yufu Japan