title: Sex chromatin aberrations among children with severe mental retardation.
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007361:Intelligence Tests; D008297:Male; D008403:Mass Screening; D009061:Mouth Mucosa / Q000166:cytology; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations / Q000453:epidemiology*