[1] Hosp Univ Donostia, Serv Neurol, P Doctor Begiristain 109, E-20014 San Sebastian, Guipuzcoa, Spain
[2] Hosp Univ Donostia, Unidad Enfermedades Infecciosas, San Sebastian, Guipuzcoa, Spain
[3] Univ Basque Country, Fac Med, E-48080 Bilbao, Spain
[4] Inst Biodonostia, Area Neurociencias, San Sebastian, Guipuzcoa, Spain