1. Department of Nasopharyngeal Carcinoma; Guangzhou People's Republic of China.
2. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy; Guangzhou People's Republic of China.
3. Department of Head and Neck Surgery; Guangzhou People's Republic of China.
4. Department of Clinical Research; Sun Yat-sen University Cancer Center; Guangzhou People's Republic of China.
5. Department of Medical Statistics and Epidemiology, School of Public Health; Sun Yat-sen University; Guangzhou People's Republic of China.