1. Department of Hepatobiliary Pancreatic Surgery, The Second People’s Hospital of Neijiang, Luzhou Medical College, Neijiang, Sichuan 641003, China
2. Department of Cancer, The Second People’s Hospital of Neijiang, Luzhou Medical College, Neijiang, Sichuan 641003, China
3. Department of Hepatobiliary Pancreatic Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China