1. Division of Urologic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA.
2. University of Missouri–Kansas City School of Medicine, Kansas City, Missouri, USA.
3. Division of Interventional Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri, USA.
4. Division of Interventional Radiology, Department of Radiology, University of Rochester Medical Center, Rochester, New York, USA.