Department of Hepatic Surgery, West China Hospital, Sichuan University, Department of Hepatic Surgery, West China Hospital, Sichuan University, Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Sichuan University, Department of Digestive Medical, West China Hospital, Sichuan University, Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Sichuan University - Department of Gastrointestinal Surgery and Sichuan University - Department of Hepatic Surgery