1. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
2. Department of Radiotherapy, Cancer Center, The First People’s Hospital of Foshan, Foshan, Guangdong, China
3. Department of Radiotherapy, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
4. Department of Radiotherapy, Cancer Center, The People’s Hospital of Zhongshan, Zhongshan, Guangdong, China