1. Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, People’s Republic of China;
2. Department of Hepatobiliary Surgery, Suining Central Hospital, Sichuan, People’s Republic of China;
3. Department of Hepatobiliary and Thyroid Breast Surgery, Tongnan District People's Hospital, Chongqing, People’s Republic of China