1. Department of Internal Medicine, Yale University School of Medicine New Haven Connecticut
2. Meyers Primary Care Institute, a Joint Endeavor of University of Massachusetts Medical School, Fallon Health, and Reliant Medical Group Worcester Massachusetts
3. Division of ResearchKaiser Permanente Northern California Oakland California
4. Department of Medicine, University of Colorado Anschutz Medical Campus Aurora Colorado
5. Department of Emergency MedicineUniversity of Colorado Anschutz Medical Campus Aurora Colorado
6. Institute for Health ResearchKaiser Permanente Colorado Denver Colorado
7. Center for Clinical Epidemiology & Population Health, Marshfield Clinic Research Foundation Marshfield Wisconsin
8. Department of Public Health SciencesHenry Ford Hospital Detroit Michigan
9. Department of Cardiac ElectrophysiologyKaiser Permanente Santa Clara Medical Center Santa Clara California
10. Department of Research and EvaluationKaiser Permanente Southern California Pasadena California
11. Center for Health ResearchKaiser Permanente Northwest Portland Oregon
12. National Cardiovascular Data Registry, American College of Cardiology Foundation Washington, DC
13. Department of Cardiac ElectrophysiologyKaiser Permanente Los Angeles Medical Center Los Angeles California
14. Heart and Vascular Institute, Henry Ford Health System Detroit Michigan
15. Marshfield Clinical Research Foundation, Marshfield Clinic Marshfield Wisconsin
16. Department of Medicine, Mayo Clinic Rochester Minnesota
17. Departments of Epidemiology, Biostatistics and MedicineUniversity of California San Francisco San Francisco, California
18. Departments of MedicineHealth Research and Policy, Stanford University School of Medicine Palo Alto California