title: Population studies in northern Sweden. IX. Incidence of Down's syndrome by time, region and maternal age.
mesh_terms: D000328:Adult; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D005828:Genetics, Population; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D013548:Sweden