1. Division of Urologic Surgery, Department of Surgery and Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri
2. Department of Urology, School of Medicine, University of Washington, Seattle, Washington
3. Department of Urology, Temple University School of Medicine, Philadelphia, Pennsylvania
4. Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
5. Department of Medicine, University of Washington, Seattle, Washington
6. Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania