1. Department of Pancreatic and Gastric Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, China
2. Department of General Surgery, Peking University Third Hospital, China
3. Department of Radiation Oncology, Shandong Provincial Qianfoshan Hospital, China
4. Department of Cancer Epidemiology and Health Statistics, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, China
5. Department of Medical Oncology, Affiliated Hospital of Qinghai University, China