1. Department of Clinical Oncology St. Marianna University School of Medicine Kawasaki Japan
2. Norris Comprehensive Cancer Center University of Southern California Los Angeles USA
3. Showa University Research Administration Center Showa University Tokyo Japan
4. Department of Gastroenterology The Cancer Institute Hospital of Japanese Foundation for Cancer Research Tokyo Japan
5. Department of Gastrointestinal Medical Oncology National Cancer Center Hospital Tokyo Japan
6. Department of Gastroenterology Saitama Cancer Center Saitama Japan
7. Department of Gastrointestinal Medical Oncology National Hospital Organization Shikoku Cancer Center Matsuyama Japan
8. Department of Gastroenterological Oncology Hyogo Cancer Center Akashi Japan
9. Gastroenterology and Gastrointestinal Oncology National Cancer Center Hospital East Kashiwa Japan
10. Division of Clinical Oncology Hiroshima Prefectural Hospital Hiroshima Japan
11. West Japan Oncology Group (WJOG) Data Center Division Yokohama Japan
12. Department of Gastroenterology University of Tsukuba Tsukuba Japan
13. Department of Clinical Oncology Aichi Cancer Center Nagoya Japan
14. Department of Surgery Yodogawa Christian Hospital Osaka Japan
15. Division of Gastric Surgery Shizuoka Cancer Center Nagaizumi Japan
16. Kyoto Innovation Center for Next Generation Clinical Trials and iPS Cell Therapy (Ki‐CONNECT) Kyoto University Hospital Kyoto Japan