1. 1st Cardiology Department, Onassis Cardiac Surgery Center, Kallithea, 17674 Athens, Greece
2. Department of Cardiology, University of Thessaly, Biopolis, P.O. Box 1400, 41110 Larissa, Greece
3. Department of Thoracic and Cardiovascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Biopolis, P.O. Box 1400, 41110 Larissa, Greece
4. 2nd Molecular Immunopathology Laboratory, Onassis Cardiac Surgery Center, Kallithea, 17674 Athens, Greece