[1] Univ Hosp 12 de Octubre, Dept Neurol, Madrid, Spain
[2] Univ Hosp Gregorio Maranon, Dept Neurol, Madrid, Spain
[3] Univ Hosp Getafe, Dept Neurol, Madrid, Spain
[4] Univ Hosp Principe de Asturias, Dept Neurol, Madrid, Spain
[5] Leicestershire Partnership Trust, Dept Psychol, Leicester, Leics, England
[6] Univ Leicester, Leicester LE1 7RH, Leics, England
[7] Ctr Invest Biomed Red Enfermedades Neurodegenerat, Madrid, Spain
[8] Univ Complutense, Dept Med, E-28040 Madrid, Spain