Bo Sun1,2, Yang Han1,2, Hong Cai3,4, Hua Huang5,6, Yi Xuan7,8. 1. Department of Gastric Surgery, Fudan University Shanghai Cancer Center, No. 270 Dongan Road, Shanghai, 200032, China. 2. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. 3. Department of Gastric Surgery, Fudan University Shanghai Cancer Center, No. 270 Dongan Road, Shanghai, 200032, China. caihong450@hotmail.com. 4. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. caihong450@hotmail.com. 5. Department of Gastric Surgery, Fudan University Shanghai Cancer Center, No. 270 Dongan Road, Shanghai, 200032, China. huahuang@fudan.edu.cn. 6. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. huahuang@fudan.edu.cn. 7. Department of Gastric Surgery, Fudan University Shanghai Cancer Center, No. 270 Dongan Road, Shanghai, 200032, China. xuanyi0118@126.com. 8. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China. xuanyi0118@126.com.