1. Shandong Medical Imaging Research Institute, Shandong University, Jinan, Shandong 250021, P.R. China
2. Department of Radiology, People's Hospital of Wuhe County, Bengbu, Anhui 233300, P.R. China
3. Department of Interventional Radiology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221100, P.R. China
4. Department of Interventional Radiology, Anhui Provincial Hospital, Hefei, Anhui 230000, P.R. China