1. Department of Cardiology University Heart Centre Zurich Zurich Switzerland
2. Robertson Centre for Biostatistics University of Glasgow Glasgow United Kingdom
3. Cardiac Arrhythmia Service Massachusetts General Hospital, Harvard Medical School Boston MA USA
4. Department of Cardiology Leiden University Medical Centre Leiden the Netherlands
5. Division of Cardiovascular Medicine and Howard Gilman and Ron and Jean Schiavone Institutes State University of New York Downstate College of Medicine New York NY USA
6. University of Bergen Bergen Norway
7. Stavanger University Hospital Stavanger Norway
8. University of Pittsburgh Pittsburgh PA USA
9. Nouvelles Cliniques Nantaises Nantes France
10. Monash Centre of Cardiovascular Research and Education in Therapeutics Melbourne VIC Australia
11. Department of Cardiology and Clinical Institute Aalborg University Hospital Aalborg Denmark
12. Division of Cardiovascular Medicine Ohio State University Medical Center Columbus OH USA
13. Cardiology Department, Thorax Institute, Hospital Clinic University of Barcelona Spain