[1] Santa Maria Univ Hosp, Dept Neurol, Lisbon, Portugal
[2] Santa Maria Univ Hosp, Dept Neurosci & Mental Hlth, Lisbon, Portugal
[3] Hosp Clin San Carlos, Dept Neurol, Madrid, Spain
[4] Univ Autonoma Barcelona, Hosp Gen Valle Hebron, Neurovasc Unit, Dept Neurol, E-08193 Barcelona, Spain
[5] Univ Autonoma Barcelona, Epidemiol & Biostat Lab, E-08193 Barcelona, Spain
[6] Hosp Clin Barcelona, Clin Trials Unit, Pharmacol Unit, Barcelona, Spain