1 Cardiocenter of the Third Faculty of Medicine Charles University and the University Hospital Kralovske Vinohrady, Prague 100 34, Czech Republic. Electronic address: zuzana.motovska@lf3.cuni.cz.
2 Department of Cardiology and Angiology, University Hospital Tübingen, Eberhard Karls Universtität Tübingen, Tübingen, Germany.