1. Department of Hepatobiliary Surgery, the Second Affiliated Hospital of Chongqing Medical University , Chongqing , China
2. Department of Hepatobiliary Surgery, the Sixth People’s Hospital of Chengdu , Chengdu , China
3. Department of Hepatobiliary Surgery, the Chongqing University Jiangjin Hospital, School of Medicine, Chongqing University , Chongqing , China
4. Department of Urology Surgery, the Second Affiliated Hospital of Chongqing Medical University , Chongqing , China