[1] UCL, Inst Neurol, Dept Mol Neurosci, London WC1N 3BG, England
[2] Inst Neurol, Dept Neurodegenerat Dis, London WC1N 3BG, England
[3] Inst Neurol, Reta Lila Weston Inst, London WC1N 3BG, England
[4] NIA, Cell Biol & Gene Express Unit, Bethesda, MD 20892 USA
[5] NIA, Mol Genet Unit, Bethesda, MD 20892 USA
[6] Univ Coimbra, Ctr Neurosci & Cell Biol, P-3000 Coimbra, Portugal