title: [Epidemiology of mental retardation].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012537:Scandinavian and Nordic Countries
vernacular_title: Den mentale retarderings epidemiologi.