Affiliation: | ∗ Department of Radiation Oncology, State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, People''s Republic of China;† Imaging Diagnosis and Interventional Center, State Key Laboratory of Oncology in South China, Sun Yat-sen University Cancer Center, Guangzhou, People''s Republic of China;‡ Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, People''s Republic of China |