[1] Washington Univ, Sch Med, Alzheimers Dis Res Ctr, St Louis, MO 63108 USA
[2] Washington Univ, Sch Med, Dept Neurol, Div Neuropathol, St Louis, MO 63108 USA
[3] Washington Univ, Sch Med, Dept Pathol, St Louis, MO 63108 USA
[4] Washington Univ, Sch Med, Div Biostat, St Louis, MO 63108 USA
[5] Washington Univ, Sch Med, Dept Med, Div Geriatr & Gerontol, St Louis, MO 63108 USA
[6] Valley Med Ctr, Div Family Med, Renton, WA USA