1. Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina
2. Department of Urology, School of Medicine, University of Virginia, Charlottesville, Virginia
3. Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina
4. Brady Urological Institute, The Johns Hopkins University, Baltimore, Maryland
5. Department of Urology, University of Texas Southwestern Medical Center, Dallas, Texas
6. Department of Urology, University of California-Los Angeles, Los Angeles, California