1. Division of Cardiology, Department of MedicineBrigham and Women's Hospital, Harvard Medical School Boston MA USA
2. Department of CardiologyKaiser Permanente San Francisco Medical Center San Francisco CA USA
3. Division of Cardiology, Duke University Medical CenterDuke Clinical Research Institute Durham NC USA
4. Department of MedicineUniversity of Mississippi Jackson MS USA
5. University of Groningen Groningen The Netherlands
6. Heart and Vascular Institute, Cleveland Clinic Foundation Cleveland OH USA
7. Canadian VIGOUR CentreUniversity of Alberta Edmonton Canada
8. Division of CardiologyUniversity of Brescia Brescia Italy
9. Inova Heart and Vascular Institute Falls Church VA USA