Ethics approval and consent to participate
Cancer
WEST, CANCER
The trial protocol was approved by the institutional review board or ethnic review committee of all participating centers: Peking University Cancer Hospital and Institute (2017YW02; 2017YW03); West China Second University Hospital, Sichuan University (Y2018009); Qilu Hospital of Shangdong University (2018007); Xiangya Hospital, Central South University (201710116); Hunan Cancer Hospital (2018 [No.193]); Sir Run Run Shaw Hospital, Zhejiang University School of Medicine (20180206–2); Tianjin Medical University Cancer Institute and Hospital (E2018053); Harbin Medical University Cancer Hospital (2018–129); Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (2018 [No.19]). All procedures were conducted in accordance with the guidelines of Good Clinical Practice and the Declaration of Helsinki. All patients provided written informed consent before enrollment.