1. Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China
2. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
3. Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangzhou, P.R. China
4. Department of Medical Imaging, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China
5. Department of Radiation Oncology, First Affiliated Hospital of Kunming Medical University, Kunming, P.R. China
6. Department of Biostatistics, School of Public Health, Southern Medical University, Guangzhou, P.R. China
7. Department of Clinical Research, Sun Yat-sen University Cancer Center, Guangzhou, P.R. China