1. From the Department of Radiology (I.A.-S., J.v.d.G., M.A.v.B.), Department of Gerontology and Geriatrics (I.A.-S., R.G.J.W., A.B.M., A.J.M.d.C.), and Department of Molecular Epidemiology (P.E.S.), Leiden University Medical Center, Leiden, the Netherlands; and the Netherlands Consortium for Healthy Ageing, Leiden, the Netherlands (I.A.-S., J.v.d.G., P.E.S., R.G.J.W., A.B.M., M.A.v.B., A.J.M.d.C.).