1. Division of Vascular and Interventional Radiology, Department of Radiology, University of Michigan Health Systems, Ann Arbor, Michigan.
2. Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan.
3. Duke University, Durham, North Carolina.
4. Department of Surgery and Perioperative Care, Dell Medical School, The University of Texas at Austin, Austin, Texas.
5. Department of Urology, University of Michigan Health Systems, Ann Arbor, Michigan.