1. Department of Vascular Surgery, The People's Hospital of Weifang, Weifang, Shandong 310009, P.R. China
2. Department of Radiology, Traditional Chinese Medicine Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
3. Department of Interventional Radiology, The People's Hospital of Weifang, Weifang, Shandong 310009, P.R. China