type: 6_or_2_or_102_or_999subjectTerm: I. MATHEMATICS AND COMPUTER SCIENCE_or_IV. MEDICINE AND HEALTH SCIENCES, LIFE SCIENCES, BIOLOGICAL SCIENCES_or_V. LAW AND SOCIAL SCIENCESauthor: Kefalas, Petros_or_Kolettis, Theofilos_or_Vougioukas, Dimosthenis_or_Kalligeros, Emmanouil