1. Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310006, P.R. China
2. Division of Hepatobiliary and Pancreatic Surgery, Yinzhou Hospital Affiliated to Medical School of Ningbo University, Ningbo, Zhejiang 315040, P.R. China