1. Cardiology Department, Nicosia General Hospital, State Health Services Organization, Nicosia 2029, Cyprus
2. Third Department of Cardiology, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece
3. Medical School, University of Cyprus, Nicosia 2115, Cyprus
4. Second Department of Cardiology, Aristotle University of Thessaloniki, 54642 Thessaloniki, Greece
5. First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece