Affiliation: | (1) Signa Cor laboratory, Lubliana str 46, 1618 Sofia, Bulgaria;(2) Faculty of Electronic Engineering and Technologies (FETT), Technical University of Sofia, Kliment Ohridski str. 8, 1000 Sofia, Bulgaria;(3) Centre of Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev str., blok 105, 1113 Sofia, Bulgaria |