1. Veterans Affairs Eastern Colorado Health Care System, Denver2University of Colorado School of Medicine at the Anschutz Medical Campus, Aurora3Colorado Cardiovascular Outcomes Research Consortium, Denver
2. Saint Luke’s Mid America Heart Institute and University of Missouri–Kansas City
3. University of Michigan Medical School, Ann Arbor
4. Duke University Medical Center, Durham, North Carolina
5. University of Washington, Seattle
6. Dartmouth-Hitchcock Medical Center, Hanover, New Hampshire