1. Department of Medical Oncology, The Sixth People's Hospital of Chengdu, Chengdu, Sichuan 610051, P.R. China
2. Department of Medical Oncology, Dongguan People's Hospital, Dongguan, Guangdong 523059, P.R. China
3. Department of Medical Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
4. Big Data Research Center, School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, P.R. China