1. From the Section of Chronic Disease Epidemiology (J.H.L., N.B.A., E.W., S.B.J.), Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, Conn; the Center for Outcomes Research and Evaluation (Y.W.), Yale New Haven Hospital, New Haven, Conn; and the Department of Medicine (Neurology; L.B.G.), Duke Stroke Center, Center for Clinical Health Policy Research, Duke University and Durham VAMC, Durham, NC.