1. Department of Cardiovascular Diseases, University Hospitals Leuven , Herestraat 49, 3000 Leuven , Belgium
2. Department of Cardiovascular Sciences, Catholic University of Leuven , Herestraat 49, 3000 Leuven , Belgium
3. 3rd Department of Cardiology, Aristotle University of Thessaloniki , Hippokrateion University Hospital, Konstantinoupoleos 49, 54642 Thessaloniki , Greece