title: Karyotype variation and behavior in Down's syndrome: methodological review.
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging; D002648:Child; D002869:Chromosome Aberrations; D004314:Down Syndrome / Q000145:classification / Q000235:genetics*; D005824:Genetics, Behavioral; D006801:Humans; D007361:Intelligence Tests; D007621:Karyotyping; D009030:Mosaicism; D010551:Personality; D010641:Phenotype; D014314:Trisomy