1. Center for Care Delivery and Outcomes ResearchVA Health Care System Minneapolis MN USA
2. Department of MedicineUniversity of Minnesota Minneapolis MN USA
3. Division of Cardiovascular Medicine, Brigham and Women's HospitalHarvard University Boston MA USA
4. Novartis Pharmaceuticals Corporation East Hanover NJ USA
5. Baylor Heart and Vascular Institute, Baylor University Medical Center Dallas TX USA
6. Montreal Heart Institute and University of Montreal Montreal, Québec Canada
7. Department of MedicineMedical University of South Carolina, and the RHJ Department of Veterans Affairs Medical Center Charleston SC USA
8. Department of Molecular and Clinical MedicineUniversity of Gothenburg Gothenburg Sweden
9. British Heart Foundation and Institute of Cardiovascular and Medical SciencesUniversity of Glasgow Glasgow UK