1. Division of Pancreatic Surgery, Department of General Surgery, West China Hospital of Sichuan University, Chengdu 610041, China
2. Department of Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University, Chengdu 610065, China
3. Department of Thyroid and Breast Surgery, Chengdu Second People’s Hospital, Chengdu 610041, China