1. Department of Family Medicine and Community Health, Program in Health Disparities Research University of Minnesota Medical School Minneapolis Minnesota USA
2. Division of Biostatistics University of Minnesota School of Public Health Minneapolis Minnesota USA
3. Department of Biostatistics University of Alabama at Birmingham School of Public Health Birmingham Alabama USA
4. Department of Epidemiology University of Alabama at Birmingham School of Public Health Birmingham Alabama USA
5. Department of Urology University of Minnesota Medical School Minneapolis Minnesota USA
6. Division of Research Kaiser Permanente Northern California Oakland California USA
7. Department of Urology University of California, San Francisco San Francisco California USA
8. Division of Gerontology, Geriatrics, and Palliative Care University of Alabama at Birmingham School of Medicine and Birmingham VA Medical Center Birmingham Alabama USA