author: Gitzenis, Savvas_or_Cheliotis, Dimitrios_or_Toumpis, Stavros_or_Pseiridou, Anastasia_or_Spyropoulos, Vasileios_or_Ψειρίδου, Αναστασία__elsubjectTerm: IV. MEDICINE AND HEALTH SCIENCES, LIFE SCIENCES, BIOLOGICAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE_or_V. LAW AND SOCIAL SCIENCES