1. Division of Cardiology Duke University Medical Center Durham North Carolina
2. Department of Cardiology Aalborg University Hospital Aalborg Denmark
3. Department of Clinical Medicine Aalborg University Aalborg Denmark
4. Section of Cardiac Electrophysiology Yale School of Medicine New Haven Connecticut
5. Department of Health Science and Technology Aalborg University Aalborg Denmark
6. Duke Clinical Research Institute Durham North Carolina
7. Department of Cardiology and Clinical Research Nordsjællands Hospital Hillerød Denmark