1. Division of Cardiology University of Texas Southwestern Medical Center Dallas TX USA
2. Federal University of Rio Grande do Sul Porto Alegre Brazil
3. Brigham and Women's Hospital Boston MA USA
4. Baylor Heart and Vascular Institute, Baylor University Medical Center Dallas TX USA
5. Novartis East Hanover NJ USA
6. Institut de Cardiologie de Montreal, Université de Montreal Canada Montreal Canada
7. RHJ Department of Veterans Administration Medical Center Medical University of South Carolina Charleston SC USA
8. BHF Cardiovascular Research Centre University of Glasgow Glasgow UK
9. Cardiovascular Division Stanford University School of Medicine Palo Alto CA USA