1. Section of Cardiovascular Medicine, Department of Medicine, Yale School of Medicine, New Haven, Connecticut2Center for Outcomes Research and Evaluation, Yale-New Haven Hospital, New Haven, Connecticut
2. Division of Cardiology, Department of Medicine, VA Eastern Colorado Health Care System, Denver4Department of Medicine, University of Colorado School of Medicine at the Anschutz Medical Campus, Aurora
3. Center for Outcomes Research and Evaluation, Yale-New Haven Hospital, New Haven, Connecticut
4. Department of Medicine, University of Michigan Medical School, Ann Arbor
5. Department of Cardiovascular Research, Saint Luke's Mid America Heart Institute, Kansas City, Missouri7Department of Medicine, University of Missouri-Kansas City
6. Division of Cardiovascular Medicine, Duke Heart Center, Duke Clinical Research Institute, Duke Medicine, Durham, North Carolina
7. Yale School of Medicine, New Haven, Connecticut
8. Department of Medicine, Yale School of Medicine, New Haven, Connecticut