1. Department of Urology and Diabetes Endocrinology Research Center, University of Washington School of Medicine, Seattle, Washington
2. Department of Urologic Surgery, Vanderbilt University, Nashville, Tennessee
3. The Biostatistics Center, The George Washington University, Rockville, Maryland
4. Department of Urology, Northwestern University, Chicago, Illinois
5. Department of Medicine/Division of Endocrinology and Metabolism, University of New Mexico School of Medicine, Albuquerque, New Mexico
6. Departments of Urology and Epidemiology, University of Michigan, Ann Arbor, Michigan