Chromatin-positive and XYY boys in approved schools.
D000293:Adolescent; D000328:Adult; D001827:Body Height; D002648:Child; D006801:Humans; D007361:Intelligence Tests; D007604:Juvenile Delinquency; D007621:Karyotyping; D008297:Male; D012572:School Health Services; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations