1. Department of Radiation Oncology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, PR China
2. Health Ward, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, PR China
3. State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, PR China
4. Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, PR China