From the Memory Disorders Unit (A.V., S.R., S.M.G., B.T.H., M.C.I.) and Stroke Service (A.V., S.M.G.), Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston; Harvard School of Public Health (M.S.), Boston; Department of Biostatistics (S.C.), Collaborative Studies Coordinating Center, University of North Carolina at Chapel Hill, Stroke Prevention and Atherosclerosis Research CenterI. is currently affiliated with WW Epidemiology, GlaxoSmithKline, Research Triangle... (At 2009-01-20)