title: Chromosome examination of children, in two Danish counties, born during the period 1967-1978. Epidemiological data.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D003718:Denmark; D005260:Female; D006801:Humans; D008297:Male