[1] Univ West Attica, Dept Physiotherapy, Lab Neuromuscular & Cardiovasc Study Mot, Athens, Greece
[2] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Sch Med, Dept Neurol 2, Athens, Greece
[3] Athens Chest Hosp Sotiria, Resp Med Dept 7, Athens, Greece
[4] Athens Chest Hosp Sotiria, Asthma Ctr, Athens, Greece
[5] Natl & Kapodistrian Univ Athens, Eginit Univ Hosp, Sch Med, Dept Neurol 1, Athens, Greece
[6] Natl & Kapodistrian Univ Athens, Attikon Univ Gen Hosp, Med Sch, Dept Psychiat 2, Athens, Greece