1 Division of Biliary Surgery, Department of General Surgery, West China Hospital, Sichuan University, China.
2 Division of Biliary Surgery, Department of General Surgery, West China Hospital, Sichuan University, China; Department of Biliary Disease Research Center, West China Hospital of Sichuan University, Chengdu, China. Electronic address: 47137417@qq.com.
3 Division of Biliary Surgery, Department of General Surgery, West China Hospital, Sichuan University, China; Department of Biliary Disease Research Center, West China Hospital of Sichuan University, Chengdu, China. Electronic address: lifuyu@scu.edu.cn.