[1] Hosp Univ La Fe, Serv Neurol, E-46009 Valencia, Spain
[2] Hosp Gen Univ, Serv Neurol, Valencia, Spain
[3] Hosp Univ Doctor Peset, Secc Epidemiol, Valencia, Spain
[4] Hosp Univ Doctor Peset, Serv Neurol, Valencia, Spain
[5] Hosp Arnau Vilanova, Serv Neurol, Valencia, Spain
[6] Hosp La Ribera, Serv Neurol, Valencia, Spain