1 Third Cardiology Department, Hippokrateion University Hospital, Medical School, Aristotle University of Thessaloniki, Konstantinoupoleos 49, 54649, Thessaloniki, Greece.
2 Department of Cardiology, University of Medicine and Pharmacy of Craiova, Romania.
3 Department of Cardiovascular Diseases, University Hospitals Leuven, KU Leuven, Leuven, Belgium.