1. Division of CardiologyJohns Hopkins Medical Institutions Baltimore Maryland
2. Department of Cardiology‐ElectrophysiologyUniversity Heart Center Hamburg Hamburg Germany
3. Division of CardiologyUniversity of California San Francisco San Francisco California
4. Division of CardiologyUniversity of Toronto Toronto Canada
5. Division of Cardiology, Barts Heart CentreSaint Bartholomew's Hospital London UK
6. Department of CardiologyJ.W. Goethe University Frankfurt Germany
7. Division of CardiologySaiseikai Kumamoto Hospital Cardiovascular Center Kumamoto Japan
8. Boehringer Ingelheim PharmaIngelheim am Rhein Germany
9. Department of CardiologyRadboud University Medical Center Nijmegen the Netherlands