1. School of Computer Science, Sichuan University, Chengdu, P. R. China
2. Department of Radiation Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, P. R. China
3. Agile and Intelligent Computing Key Laboratory, Southwest China Institute of Electronic Technology, Chengdu, P. R. China
4. School of Computer Science, Chengdu University of Information Technology, P. R. China
5. Department of Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, P. R. China