1. First Department of Cardiology, AHEPA University Hospital, School of Medicine, Faculty of Health Sciences Aristotle University of Thessaloniki Thessaloniki 54124 Greece
2. Laboratory of Computing, Medical Informatics and Biomedical Imaging Technologies, School of Medicine, Faculty of Health Sciences Aristotle University of Thessaloniki Thessaloniki Greece
3. Second Department of Cardiology National and Kapodistrian University of Athens Medical School, Attikon Hospital Athens Greece
4. Interbalkan European Medical Center Thessaloniki Greece