1. Department of Ultrasound, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310002, P.R. China
2. Key Laboratory of Combined Multi‑organ Transplantation, Ministry of Public Health, Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, P.R. China
3. State Key Laboratory for Diagnosis and Treatment of Infectious Disease, Zhejiang University, Hangzhou, Zhejiang 310002, P.R. China
4. Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, P.R. China