1. Department of Hepatobiliary Pancreatic Surgery, West China Hospital, Sichuan University, China
2. Department of Hepatobiliary Pancreatic Surgery, People's Hospital of Fujian Province, Fuzhou, China
3. Department of Urological Surgery, West China Hospital, Sichuan University, China
4. Division of Infectious Diseases, State Key Laboratory of Biotherapy, Sichuan University, Chengdu, China