1. 1 Heart Institute, Faculty of Medicine, University of Pécs, Pécs, Hungary
2. 4 Heart Institute, University of Pécs, Ifjúság u. 13, H-7624, Pécs, Hungary
3. 2 Department of Cardiology, State Hospital for Cardiology, Balatonfüred, Hungary
4. 3 Department of Cardiology, Faculty of Medicine, University of Szeged, Szeged, Hungary