[1] Attikon Hosp, Pulm Hypertens Clin, Athens, Greece
[2] Natl & Kapodistrian Univ Athens, Attikon Hosp, Dept Crit Care 2, Athens, Greece
[3] Natl & Kapodistrian Univ Athens, Attikon Hosp, Dept Cardiol 2, Athens, Greece
[4] Natl & Kapodistrian Univ Athens, Eginit Hosp, Dept Neurol, Demyelinating Dis Unit, Athens, Greece
[5] Natl & Kapodistrian Univ Athens, Attikon Hosp, Dept Neurol 2, Athens, Greece