1. Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
2. Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
3. Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China
4. Division of Radiation Oncology, Division of Medical Sciences, National Cancer Centre Singapore, Singapore
5. Oncology Academic Programme, Duke-NUS Medical School, Singapore