[1] Aston Univ, Birmingham B4 7ET, W Midlands, England
[2] Washington Univ, Sch Med, Dept Neurol, St Louis, MO 63108 USA
[3] Washington Univ, Sch Med, Dept Pathol, St Louis, MO 63108 USA
[4] Washington Univ, Sch Med, Dept Immunol, St Louis, MO 63108 USA
[5] Kings Coll London, Inst Psychiat, Brain Bank, Dept Neuropathol, London SE5 8AF, England