Lan-Qing Yao1,2, Feng Shen2,3, Tian Yang4,5,6. 1. Division of Hepatobiliary and Pancreatic Surgery, Department of General Surgery, Cancer Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China. 2. Department of Hepatobiliary Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University (Navy Medical University), Shanghai, China. 3. Eastern Hepatobiliary Clinical Research Institute (EHCRI), Third Affiliated Hospital of Navy Medical University, Shanghai, China. 4. Division of Hepatobiliary and Pancreatic Surgery, Department of General Surgery, Cancer Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China. yangtianehbh@smmu.edu.cn. 5. Department of Hepatobiliary Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University (Navy Medical University), Shanghai, China. yangtianehbh@smmu.edu.cn. 6. Eastern Hepatobiliary Clinical Research Institute (EHCRI), Third Affiliated Hospital of Navy Medical University, Shanghai, China. yangtianehbh@smmu.edu.cn.