1. Section of Urology, Virginia Mason Medical Center, Seattle, Washington
2. Social & Scientific Systems, Inc., Durham, North Carolina
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina
4. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
5. Department of Population and Data Sciences, University of Texas Southwestern Medical Center, Dallas, Texas
6. Johns Hopkins University School of Medicine, Baltimore, Maryland