title: Chromosome abnormalities in children, in two Danish counties, born during the period 1967-1978: Clinical data.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D003718:Denmark; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D005500:Follow-Up Studies; D005787:Gene Frequency; D006801:Humans; D008297:Male; D010375:Pedigree; D010641:Phenotype; D012729:Sex Chromosome Aberrations / Q000235:genetics*; D013997:Time Factors