Fudan University - Department of Radiation Oncology, Nanchang University - Department of Radiation Oncology, Nanjing Medical University - Department of Radiation Oncology, Chinese Academy of Sciences (CAS) - Department of Radiation Oncology, Soochow University - Department of Radiation Oncology, Chongqing Medical University - Department of Oncology, China Medical University - Department of Radiotherapy, Guizhou Provincial People's Hospital - Department of Oncology, Fujian Medical University - Department of Radiation Oncology, affiliation not provided to SSRN, Soochow University - Department of Radiation Oncology, University of Electronic Science and Technology of China (UESTC) - Department of Radiation Oncology, Chinese Academy of Sciences (CAS) - Department of Radiation Oncology, Anhui Provincial Hospital, Qingdao University, Shanghai Jiao Tong University (SJTU), School of Medicine, Ruijin Hospital, Department of Radiation Oncology, Fudan University - Department of Radiation Oncology, Fudan University - Department of Radiation Oncology, Fudan University - Department of Radiation Oncology, Fudan University - Department of Radiation Oncology, Fudan University - Department of Colorectal Surgery and Fudan University - Department of Radiation Oncology