[1] Democritus Univ Thrace, Univ Hosp Alexandroupolis, Dept Neurol, Alexandroupolis, Greece
[2] Univ Athens, Attikon Univ Hosp, Sch Med, Dept Neurol 2, Athens, Greece
[3] St Annes Univ Hosp, Int Clin Res Ctr, Brno, Czech Republic
[4] Univ Hosp Alexandroupolis, Cardiothorac Dept, Alexandroupolis, Greece
[5] Univ Ioannina, Sch Med, Dept Neurol, GR-45110 Ioannina, Greece
[6] Univ Athens, Eginition Univ Hosp, Sch Med, Dept Neurol 1, Athens, Greece