1 Division of Biliary Tract Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
2 Center for Translational Medicine, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
3 Division of Biliary Tract Surgery, Department of General Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Electronic address: rongxingzhou@126.com.