1. Department of Interventional Radiology, First People's Hospital of Changzhou, Changzhou, Jiangsu 213000, P.R. China
2. Department of Interventional Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
3. Department of Radiology, Mayo Clinic, Jacksonville, FL 32224, USA