[1] Univ Extremadura, Dept Biochem & Mol Biol, Sch Biol Sci, E-06071 Badajoz, Spain
[2] Univ Extremadura, Dept Pharmacol & Psychiat, Sch Med, Badajoz, Spain
[3] Univ Hosp Princesa, Serv Neurol, Madrid, Spain
[4] Univ Alcala de Henares, Dept Med Neurol, Principe Asturias Hosp, Madrid, Spain