1. Department of Radiation Oncology, Fudan University Shanghai Cancer Center, and Department of Oncology, Shanghai Medical College of Fudan University, China
2. Department of Radiation Oncology, Changzhou Tumor Hospital, Soochow University, Changzhou, China
3. Department of Radiation Oncology, The Second Affiliated Hospital of Jilin University, Changchun, China
4. Department of Radiation Oncology, The Affiliated Hospital of Qingdao Medical College, Qingdao University, Qingdao, China