title: Author Response.
authors.affiliation: Nijmegen, the Netherlands.
authors.forename: Helena M
authors.initials: HM
authors.lastname: van der Holst
authors.affiliation: Nijmegen, the Netherlands.
authors.forename: Frank-Erik
authors.initials: FE
authors.lastname: De Leeuw
mesh_terms: D001921:Brain / Q000473:pathology*; D059345:Cerebral Small Vessel Diseases / Q000453:epidemiology*; D005260:Female; D006801:Humans; D056784:Leukoencephalopathies / Q000453:epidemiology*; D008297:Male; D020734:Parkinsonian Disorders / Q000453:epidemiology*