Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing);
Gastrointestinal Cancer Center;
Peking University Cancer Hospital & Institute;
Beijing 100142;
China;
Department of Surgical Oncology;
Weifang People's Hospital;
Weifang 261000;
China;
Department of General Surgery;
theFirst Affiliated Hospital of Nanchang University;
Nanchang 330006;
China;
Department of Gastrointestinal Surgery;
the First Hospital of Jilin University;
Changehun 130021;
China;
Department of General Surgery;
Nanfang Hospital;
Southern Medical University;
Guangzhou 510515;
China;
Department of Gastrointestinal Cancer Surgery;
Fujian Provincial Cancer Hospital;
Fuzhou 350014;
China;
Department of General Surgery;
Guangdong General Hospital;
Guangdong Academy of Medical Sciences;
Guangzhou 510080;
China;
Department of General Surgery;
Zhongshan Hospital;
Fudan University;
Shanghai 200032;
China;
Department of Gastrointestinal Surgery;
Hangzhou First People's Hospital;
Hangzhou 310006;
China;
Department of Gastrointestinal Surgery;
the First Affiliated Hospital;
Sun Yat-sen University;
Guangzhou 510080;
China;
Department of Surgical Oncology;
the Second Affiliated Hospital of Fujian Medical University;
Quanzhou 362000;
China;
Department of Surgical Oncology;
Affiliated Hospital of Qinghai University;
Xining 810001;
China;
Department of Gastrointestinal Surgery;
Guangdong Provincial Hospital of Chinese Medicine;
Guangzhou 510120;
China;
Department of General Surgery;
the Second Hospital of Dalian Medical University;
Dalian 116023;
China;
Department of General Surgery;
Shanghai Ruijin Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200025;
China;
Department of Gastrointestinal Surgery;
Shandong Provincial Hospital Affiliated to Shandong University;
Jinan 250021;
China;
Department of Gastrointestinal Surgery;
Harbin Medical University Cancer Hospital;
Harbin 150081;
China;
Department of General Surgery;
Tianjin Medical University General Hospital;
Tianjin 300052;
China;
Department of General Surgery;
the First Affiliated Hospital of Xi'an Jiaotong University;
Xi'an 710061;
China;
Department of Gastroenterological Surgery;
Peking University People's Hospital;
Beijing 100044;
China;
Department of General Surgery;
National Center of Gerontology;
Beijing 100730;
China;
Department of General Surgery;
Beijing Friendship Hospital;
Capital Medical University;
Beijing 100050;
China;
Department of Gastrointestinal Surgery;
Jiangsu Province Hospital;
the First Affiliated Hospital of Nanjing Medical University;
Nanjing 210005;
China;
Department of Gastrointestinal Surgery;
the Second Hospital of Jilin University;
Changchun 130041;
China;
Department of Gastrointestinal Surgery;
the First Affiliated Hospital of Xiamen University;
Xiamen 361003;
China;
Department of Gastrointestinal Surgery;
West China Hospital of Sichuan University;
Chengdu 610041;
China;
Department of Digestive Endoscopic and Minimally Invasive Surgery;
Shanxi Provincial Cancer Hospital;
Taiyuan 030013;
China;
Department of General Surgery;
the Affiliated Hospital of Qingdao University;
Qingdao 266003;
China;
Department of Gastrointestinal Surgery;
Peking University International Hospital;
Beijing 102206;
China;
Department of Gastrointestinal Surgery;
Zhongshan Hospital Xiamen University;
Xiamen 361004;
China;
Department of Gastrointestinal Surgery;
Xijing Hospital;
Fourth Military Medical University;
Xi'an 710032;
China;
Department of General Surgery;
the 307th Hospital of Chinese People's Liberation Army;
Beijing 100071;
China;
Department of Gastric Surgery;
Fudan University Shanghai Cancer Center;
Shanghai 200032;
China;
Department of Gastrointestinal Surgery;
Renji Hospital;
School of Medicine;
Shanghai Jiaotong University;
Shanghai 200127;
China;