1. Metro Urology, St. Paul, Minnesota.
2. Regions Family and Community Medicine Residency Program, HealthPartners, Inc., St. Paul.
3. Department of Family Practice and Community Medicine, University of Minnesota, Minneapolis, Minnesota.
4. Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School.
5. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts.