1. Department of General Surgery, Second Hospital of Lanzhou University, Lanzhou, China
2. Department of Special Treatment, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
3. Department of Hepatobiliary Surgery, the 101th Hospital of Chinese PLA, Wuxi, China
4. Department of General Surgery, First Hospital of Lanzhou University, Lanzhou, China
5. Department of Liver Surgery, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
6. Department of Hepatobiliary and Pancreatovascular Surgery, First Affiliated Hospital of Xiamen University, Xiamen, China