1. Department of Surgery, Section of Urology, Yale University, New Haven, Connecticut
2. Division of Urology, University of Pennsylvania, Philadelphia, Pennsylvania
3. Department of Urology, Queen's University, Kingston, Ontario, Canada
4. Urology Department, Stanford University Medical Center, Stanford, California
5. Department of Urology, University of Rochester, Rochester, New York
6. Department of Urology, Henry Ford Hospital, Detroit, Michigan
7. Department of Urology, University of Washington, Seattle, Washington
8. Division of Urology, University of Maryland, Baltimore, Baltimore, Maryland
9. Department of Urology, University of Iowa, Iowa City, Iowa
10. William Beaumont Hospital, Royal Oak, Michigan
11. Department of Reproductive Medicine, University of California, San Diego, La Jolla, California
12. Departments of Obstetrics & Gynecology, and Urology, Loyola University, Maywood, Illinois
13. Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
14. National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland