[1] Univ Ioannina, Unit Med Technol & Intelligent Informat Syst, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece
[2] Natl Tech Univ Athens, Div Commun Elect & Informat Engn, Sch Elect & Comp Engn, GR-15780 Athens, Greece
[3] Natl & Kapodistrian Univ Athens, Dept Pathophysiolo, Fac Med, GR-15772 Athens, Greece
[4] Udine Univ, Dept Med & Biol Sci, Clin Rheumatol, IT-33100 Udine, Italy