1. Department of Cardiology, St. Antonius Hospital Nieuwegein, Koekoekslaan 1, EM Nieuwegein, The Netherlands
2. Clinic for Cardiology, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Georgstrasse 11, Bad Oeynhausen, Germany
3. Unit for Inherited Cardiac Diseases, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, Copenhagen, Denmark
4. Department of Cardiology, Thoraxcenter Erasmus Medical Center, s-Gravendijkwal 230, CE Rotterdam, The Netherlands
5. Department of Cardiology, Herlev-Gentofte Hospital, Copenhagen University Hospital, Kildegardsvej 28, Hellerup, Denmark
6. Department of Internal Medicine, Leopoldina Hospital, Gustav-Adolf-Strasse 8, Schweinfurt, Germany
7. Department of Cardiology, 2nd Medical School, Charles University, University Hospital Motol, V Uvalu 84, Prague, Czech Republic