1. Department of Radiation Oncology, Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China.
2. Eight-Year Medical Doctor Program, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China.
3. Department of Radiation Oncology, Xijing Hospital, Air Force Medical University of PLA (the Fourth Military Medical University), Xi’an, People’s Republic of China.
4. Department of Radiation Oncology, The Second Hospital of Dalian Medical University, Dalian, People’s Republic of China.
5. Department of Radiation Oncology, The Second Hospital Affiliated by Jilin University, Changchun, People’s Republic of China.