1. From the Departments of Radiology (M.K.L., J.v.d.G., R.v.d.B., M.A.v.B.), Clinical Genetics (M.H.B., S.A.J.L.O.), Neurology (J.H., M.D.F.), and Neuropsychology (Y.M.K., H.A.M.M.), Leiden University Medical Center, Leiden, The Netherlands; Department of Neurology (J.H.), Rijnland Hospital, Leiderdorp, The Netherlands; Department of Psychology (H.A.M.M.), Neuropsychology unit, Leiden University, The Netherlands.