Cheng Luo

Department of General Surgery, The Thirteenth People's Hospital of Chongqing, Chongqing 400010, China

Yakun Wu

Department of Hepatobiliary Surgery, Suining Central Hospital, Suining 629000, China

Shaoyong Liang

Department of General Surgery, The Thirteenth People's Hospital of Chongqing, Chongqing 400010, China