1. From the Departments of Epidemiology (O.H.K., R.C.K., B.M.P., S.R.H., W.T.L.), Medicine (B.M.P., N.L.S., R.N.L., W.T.L.), Health Services (B.M.P.), and Neurology (W.T.L.), Cardiovascular Health Research Unit, University of Washington, Seattle; and the Department of Pharmacoepidemiology and Pharmacotherapy (O.H.K., H.G.M.L., A. de B.), Utrecht Institute of Pharmaceutical Sciences, Utrecht University (Netherlands).