1 Division of Vascular and Interventional Radiology (T.G., C.R.W.), Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Park 300, 1800 Orleans Street, Baltimore, Maryland; Division of Vascular and Interventional Radiology (A.S., D.D.), Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts; Division of Vascular and Interventional Radiology (J.S.), MedStar Georgetown University Hospital, MedStar Washington Hospital Center, Columbia, Maryland; Division of Vascular and Interventional Radiology (Z.B.), UHN Department of Radiology, University of Toronto, Toronto, ON, Canada. Electronic address: tgarg3@jhmi.edu.
2 Division of Vascular and Interventional Radiology (T.G., C.R.W.), Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Park 300, 1800 Orleans Street, Baltimore, Maryland; Division of Vascular and Interventional Radiology (A.S., D.D.), Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts; Division of Vascular and Interventional Radiology (J.S.), MedStar Georgetown University Hospital, MedStar Washington Hospital Center, Columbia, Maryland; Division of Vascular and Interventional Radiology (Z.B.), UHN Department of Radiology, University of Toronto, Toronto, ON, Canada.