1. Department of Hepatobiliary Surgery, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture (Enshi Clinical College of Wuhan University), Enshi, Hubei 445000, P.R. China
2. Department of Radiology, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture (Enshi Clinical College of Wuhan University), Enshi, Hubei 445000, P.R. China