title: Sex chromatin deviations among school children in special classes. A study of prevalence and an investigation of birth histories.
mesh_terms: D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007360:Intelligence; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000453:epidemiology; D008297:Male; D009061:Mouth Mucosa / Q000166:cytology; D012574:Schools; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations / Q000453:epidemiology*; D013548:Sweden; D014424:Turner Syndrome / Q000453:epidemiology