1. The Department of Internal Medicine Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
2. Department of Internal Medicine-Cardiology, Klinikum Nürnberg, Nuremberg, Germany
3. Klinik und Poliklinik für Innere Medizin II, University Medical Center Regensburg, Regensburg, Germany