1. Department of Nasopharyngeal Carcinoma; Sun Yat-sen University Cancer Center; 651 Dongfeng East Road Guangzhou 510060 People's Republic of China
2. Collaborative Innovation Center for Cancer Medicine, State Key Laboratory of Oncology in South China; Sun Yat-sen University Cancer Center; Guangzhou 510060 People's Republic of China
3. Department of Information Technology; Sun Yat-sen University Cancer Center; 651 Dongfeng East Road Guangzhou 510060 People's Republic of China
4. Department of Clinical Research; Sun Yat-sen University Cancer Center; 651 Dongfeng East Road Guangzhou 510060 People's Republic of China
5. Department of Medical Statistics and Epidemiology, School of Public Health; Sun Yat-sen University; 74 Zhongshan Second Road Guangzhou 510080 People's Republic of China
6. Department of Radiation Oncology; Sun Yat-sen University Cancer Center; 651 Dongfeng East Road Guangzhou 510060 People's Republic of China