1. Department of Health Services Management, National School of Public Health, Athens, Greece
2. Department of Cytopatholology, “Attikon” University Hospital, Athens, Greece
3. Department of Cytopathology, “Attikon” University Hospital, Athens, Greece & Department of Biochemistry, “Asclepeion” Voulas, Greece
4. Department of Biochemistry, Naval and Veterans Hospital, Athens, Greece
5. Department of Economics, University of Piraeus, Piraeus, Greece