1. Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
2. University of Texas Southwestern Medical Center, Dallas, Texas
3. Medical College of Wisconsin, Milwaukee, Wisconsin
4. University of Wisconsin Clinical Science Center, Madison, Wisconsin
5. Weill Cornell Medical College, New York, New York
6. Division of Kidney, Urologic and Hematologic Diseases, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
7. American College of Radiology, Reston, Virginia