M. W. Vernooij, MD, PhD, M. A. Ikram, MD, PhD, A. Hofman, MD, PhD, G. P. Krestin, MD, PhD, M.M.B. Breteler, MD, PhD and A. van der Lugt, MD, PhD From the Departments of Epidemiology (M.W.V., M.A.I., A.H., M.M.B.B.) and Radiology (M.W.V., G.P.K., A.v.d.L.), Erasmus MC University Medical Center, Rotterdam, The Netherlands. Address correspondence and reprint requests to Dr. Aad van der Lugt, Dep