1. Division of Cardiology, Veterans Affairs Health Care System, Minneapolis, Minnesota2Division of Cardiovascular Diseases, University of Minnesota, Minneapolis
2. Division of Cardiology, Department of Medicine, University of Washington, Seattle
3. Cardiovascular Division, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
4. Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota
5. Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota6Department of Medicine and Division of Epidemiology and Community Health, University of Minnesota, Minneapolis