1. Key Laboratory of Carcinogenesis and Translational Research (MOE/Beijing), Division of Etiology, Peking University Cancer Hospital and Institute, Beijing 100142, China
2. Division of Etiology, Beijing Cancer Hospital, Beijing 100142, China
3. Radiation Oncology Department, Tianjin Medical University General Hospital, Tianjin 300052, China
4. Department of Biomedical Engineering, Peking University Cancer Hospital and Institute, Beijing 100871, China