1 Department of Biliary Surgery, West China Hospital of Sichuan University, Chengdu, 610041, Si chuan Province, China.
2 Department of Biliary Surgery, West China Hospital of Sichuan University, Chengdu, 610041, Si chuan Province, China. Electronic address: linyixin_eason@126.com.
3 Department of Biliary Surgery, West China Hospital of Sichuan University, Chengdu, 610041, Si chuan Province, China. Electronic address: lfy_74@hotmail.com.