1. Division of Cardiology Department of Medicine Duke University Durham North Carolina USA
2. Duke Clinical Research Institute Durham North Carolina USA
3. Department of Cardiology Lund University Lund Sweden
4. Maine Medical Center Portland Maine USA
5. Department of Pharmacy Duke University Medical Center Durham North Carolina USA
6. Section of Cardiovascular Medicine Department of Internal Medicine Yale University New Haven Connecticut USA
7. Section of Cardiac Electrophysiology Inova Heart and Vascular Institute Fairfax Virginia USA