1. Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China;
2. Harbin Medical University Cancer Hospital, Harbin, China;
3. Cancer Hospital, Chinese Academy Medical Sciences, Beijing, China;
4. Peking Union Medical College Hospital, Beijing, China;
5. General Hospital of Shenyang Military Region, Shenyang, China;
6. Tianjin Medical University Cancer Institute and Hospital, Tianjin, China;
7. Fudan University Shanghai Cancer Center, Shanghai, China;
8. Department of Abdominal Cancer, Cancer Center, West China Hospital, Sichuan University, Chengdu, China;
9. Chongqing Cancer Hospital, Chongqing, China;
10. Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China;
11. Medical Oncology Department, Nanjing Bayi Hospital, Nanjing, China;
12. Liaoning Cancer Hospital & Institute, Shenyang, China;
13. Cancer Hospital Chinese Academy of Medical Sciences, Beijing, China;
14. Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing, China;