1. Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri, USA

2. Department of Radiology, Division of Endovascular Surgery and Interventional Radiology, Lexington Veterans Affairs (VA) Medical Center, Lexington, Kentucky, USA

3. Department of Diagnostic and Interventional Radiology, University of Texas Health Center, Houston, Texas, USA