1. State Key Laboratory of Oncology in South China; Department of Radiation Oncology; Sun Yat-sen University Cancer Center; Guangzhou People's Republic of China
2. Department of Medical Oncology; The Third Affiliated Hospital; Sun Yat-sen University; Guangzhou People's Republic of China
3. State Key Laboratory of Oncology in South China; Imaging Diagnosis and Interventional Center; Sun Yat-sen University Cancer Center; Guangzhou People's Republic of China
4. Department of Medical Statistics and Epidemiology; School of Public Health; Sun Yat-sen University; Guangzhou People's Republic of China