1. Department of Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China
2. Department of Oncology, Cancer Hospital Affiliate to School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
3. Department of Gastrointestinal Surgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan Province, China