[1] Univ Lagos, Coll Med, Dept Med, Neurol Unit, Lagos, Nigeria
[2] NIA, Lab Neurogenet, NIH, Bethesda, MD USA
[3] Fed Med Ctr, Dept Med, Neurol Unit, Abeokuta, Nigeria
[4] Reta Lila Weston Inst, Inst Neurol, Dept Mol Neurosci & Neurodegenerat Dis, London, England
[5] Univ Coimbra, Ctr Neurosci & Cell Biol, P-3000 Coimbra, Portugal