1 Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, Hangzhou, China; Department of Surgery, City of Hope National Medical Center, Duarte, CA, USA.
2 Department of Surgery, City of Hope National Medical Center, Duarte, CA, USA.
3 Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, Hangzhou, China.
4 Department of Hepatobiliary and Pancreatic Surgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang University, Hangzhou, China. Electronic address: liangtingbo@zju.edu.cn.