Department of Medical Oncology;
Sun Yat-sen University Cancer Center;
State Key Laboratory of Oncology in South China;
Collaborative Innovation Center for Cancer Medicine;
Guangzhou 510060;
Guangdong;
P.R.China;
Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education);
Department of Gastrointestinal Oncology;
Peking University Cancer Hospital&Institute;
No 52;
Fucheng Road;
Haidian District;
Beijing 100142;
P.R.China;
Department of Medical Oncology;
Second Affiliated Hospital of Nanjing Medical University;
Nanjing 210011;
Jiangsu;
P.R.China;
Cancer Center of Union Hospital;
Tongji Medical College;
Huazhong University of Science and Technology;
Wuhan 430030;
Hubei;
P.R.China;
Department of Medical Oncology;
Fujian Medical University Union Hospital;
Fuzhou 350001;
Fujian;
P.R.China;
Department of Surgical Oncology;
Second Hospital Affiliated to Zhejiang University School of Medicine;
Hangzhou 310009;
Zhejiang;
P.R.China;
Department of Oncology;
First Affiliated Hospital of Guangzhou Medical University of Chinese Medicine;
Guangzhou 510405;
Guangdong;
P.R.China;
Department of Medical Oncology;
Chinese Academy of Medical Sciences Cancer Hospital;
Beijing 100021;
P.R.China;
Department of Medical Oncology;
First Affiliated Hospital of Nanchang University;
Nanchang 330006;
Jiangxi;
P.R.China;
Department of Medical Oncology;
First People’s Hospital of Changzhou;
Changzhou 213003;
Jiangsu;
P.R.China;
Department of Medical Oncology;
Fudan University Cancer Hospital;
Shanghai 200032;
P.R.China;
Department of Medical Oncology;
First Hospital of China Medical University;
Shenyang 110001;
Liaoning;
P.R.China;
Cancer Center;
Daping Hospital and Institute of Surgery Research;
Third Military Medical University;
Chongqing 400042;
P.R.China;
Department of Gastrointestinal Medical Oncology;
Tianjin Medical University Cancer Institute and Hospital;
Tianjin 300060;
P.R.China;
Department of Oncology;
PuAi Hospital of Tongji Medical College;
Huazhong University of Science and Technology;
Wuhan 430032;
Hubei;
P.R.China;
Department of Medical Oncology;
Harbin Medical University Cancer Hospital;
Harbin 150081;
Heilongjiang;
P.R.China;
Department of Oncology;
Jinan Military General Hospital;
Jinan 250000;
Shandong;
P.R.China;
Department of Tumor Chemotherapy and Radiology;
Peking University Third Hospital;
Beijing 100191;
P.R.China;
Department of Gastrointestinal Surgery;
First Affiliated Hospital of Guangzhou Medical University;
Guangzhou 510120;
Guangdong;
P.R.China;
Department of Clinical Medicine;
Jiangsu Hengrui Medicine Co.;
Ltd;
Lianyungang 222047;
Jiangsu;
P.R.China;
Department of Epidemic and Health Statistics;
Nanjing Medical University;
Nanjing 211166;
Jiangsu;
P.R.China;