1. Fourth Department of Internal Medicine, University of Athens School of Medicine, University General Hospital Attikon, Athens, Greece
2. Cardiology Department, Hippocration General Hospital, Athens, Greece
3. Third Department of Internal Medicine, University of Athens School of Medicine, Sotiria General Hospital for Chest Diseases, Athens, Greece
4. Experimental Research Department of ELPEN-Pharma, Athens, Greece
5. Department of Histology and Embryology, University of Athens School of Medicine, Athens, Greece
6. Second Department of Cardiology, University of Athens School of Medicine, University General Hospital Attikon, Athens, Greece