1. From the Department of Gerontology and Geriatrics (B.S., R.G.J.W., A.J.M.d.C.), Department of Radiology (B.S.), and Department of Public Health and Primary Care (J.G., W.d.R.), Leiden University Medical Center, Leiden, The Netherlands; and Netherlands Consortium for Healthy Ageing, Leiden, The Netherlands (R.G.J.W., A.J.M.d.C.).