1. Department of Medical Imaging and Interventional Radiology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 51060, P. R. China
2. Zhong Shan Medical School, Sun Yat-sen University, Guangzhou 510080, People's Republic of China
3. Department of Medical Oncology, Sichuan Cancer Hospital and Institute, Second People's Hospital of Sichuan Province, Chengdu, Sichuan 610041, P. R. China