1. Comprehensive Arrhythmia and Research Management Center, University of Utah School of Medicine, Salt Lake City
2. Loyola University Medical Center, Maywood, Illinois
3. University of Leipzig, Leipzig, Germany
4. Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
5. Hospital of the University of Pennsylvania, Philadelphia
6. University of Barcelona, Barcelona, Spain
7. BG-Kliniken Bergmannsheil, University of Bochum, Bochum, Germany
8. University Hospital Ghent, Ghent, Belgium
9. Kerckhoff Heart Center, Bad Nauheim, Germany
10. Massachusetts General Hospital, Boston
11. Klinikum Coburg GmbH, II, Medizinische Klinik, Coburg, Germany
12. Morsani College of Medicine, University of South Florida, Tampa
13. Ohio State University, Columbus
14. Asklepios Klinik St Georg, Hamburg, Germany
15. Medical Center Porz am Rhein, Cologne, Germany