Li Xin

Department of surgery, Dadukou District People’s Hospital, Chongqing, China

Yun-bing Wang

Department of Hepatobiliary, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China

Jian-ping Gong

2Department of Hepatobiliary, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China