1. Division of Cardiology, Massachusetts General Hospital, Boston, Massachusetts, USA
2. Division of Cardiology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
3. Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
4. Department of Cardiology, CardioVascular Center Frankfurt, Frankfurt Am Main, Germany
5. Department of Cardiology, Anglia Ruskin University, Chelmsford, UK
6. Division of Cardiology, University of Minnesota, Minneapolis, Minnesota, USA
7. E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Novosibirsk, Russia
8. Division of Cardiology, Advent Health Celebration, Orlando, Florida, USA
9. Division of Cardiology, Lenox Hill Heart and Vascular Institute of New York, New York, New York, USA
10. Cardiology Division, Dartmouth-Hitchcock Medical Center, Geisel School of Medicine, Dartmouth, Lebanon, New Hampshire, USA
11. AHEPA University Hospital & European Interbalkan Medical Center, Thessaloniki, Greece
12. Division of Cardiology, Columbia University Medical Center/New York-Presbyterian Hospital, New York, New York, USA
13. The Cardiovascular Research Foundation, New York, New York, USA
14. Cardiac Morphology, Pediatrics, Royal Brompton & Harefield NHS Trust, Imperial College London, London, UK
15. Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany