[1] Lund Univ, Wallenberg Neurosci Ctr, Neuronal Survival Unit, Dept Expt Med Sci, SE-22184 Lund, Sweden
[2] UCL, Queen Sq Brain Bank Neurol Disorders, Dept Mol Neurosci, Inst Neurol, London WC1N 3BG, England
[3] Univ Lund Hosp, Dept Clin Sci, Div Neurol, SE-22185 Lund, Sweden
[4] Lund Univ, Sect Restorat Neurol, Wallenberg Neurosci Ctr, SE-22184 Lund, Sweden