type: 7_or_1author: Kroupis, Christos_or_Fountzoula, Christina_or_Spyropoulos, Vasileios_or_Σπυρόπουλος, Βασίλειος__ellang: eldatepublished: 2015subjectTerm: IV. MEDICINE AND HEALTH SCIENCES, LIFE SCIENCES, BIOLOGICAL SCIENCES_or_I. MATHEMATICS AND COMPUTER SCIENCE