1. Department of Urology Geisinger Danville Pennsylvania
2. Department of Population Health Sciences Geisinger Danville Pennsylvania
3. Center for Health Research Kaiser Permanente Northwest Portland Oregon
4. Department of Urology University of North Carolina at Chapel Hill School of Medicine Chapel Hill North Carolina
5. Departments of Epidemiology University of North Carolina at Chapel Hill, Gillings School of Global Public Health Chapel Hill North Carolina
6. Department of Health Policy and Management University of North Carolina at Chapel Hill, Gillings School of Global Public Health Chapel Hill North Carolina