1. Department of Emergency Medicine University of Colorado, School of Medicine Aurora CO
2. Adult and Child Consortium for Health Outcomes Research and Delivery Science University of Colorado, School of Medicine Aurora CO
3. Division of Cardiology University of Colorado School of Medicine Aurora CO
4. Department of Medicine Denver Health Medical Center Denver CO
5. Department of Emergency Medicine Denver Health Medical Center Denver CO
6. Department of Epidemiology Colorado School of Public Health Aurora CO
7. Minneapolis Heart Institute and Minneapolis Heart Institute Foundation Minneapolis MN
8. Department of Cardiology Mid America Heart Institute Kansas City MO