1. Department of Oncology Fudan University Shanghai Cancer Center ShanghaiChina
2. Division of Oncology Sun Yat‐sen University Cancer Center Guangzhou Guangdong ProvinceChina
3. No. 4 Division of Oncology People's Liberation Army No. 307 Hospital Beijing China
4. Division of Gastroenterology Chiba Cancer Center Chiba City Japan
5. Department of Surgery Gastroenterology Center National Hospital Organization Kyushu Medical Center Fukuoka City Japan
6. Digestive System Medicine Department Beijing Cancer Hospital Beijing China
7. Department of Gastroenterological Surgery National Hospital Organization National Kyushu Cancer Center Fukuoka City Japan
8. Department of Internal Medicine Showa University Northern Yokohama Hospital Yokohama City Japan
9. Department of Surgery Minoh City Hospital Minoh City Japan
10. Department of Medical Oncology Saiseikai Kumamoto Hospital Kumamoto City Japan
11. Department of Surgery Hiroshima Red Cross Hospital & Atomic‐bomb Survivors Hospital Hiroshima City Japan
12. Department of Surgery National Hospital Organization Osaka National Hospital Osaka City Japan
13. Division of Oncology Chinese Institute & Hospital Chinese Academy of Medical Sciences Beijing China
14. Gastroenterological Surgery Kumamoto University Hospital Kumamoto City Japan