title: A Bucharest-district prevalence survey of low-grade mental deficiency among 7- to 15-year-old children.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002547:Cerebral Palsy / Q000453:epidemiology; D002648:Child; D002869:Chromosome Aberrations / Q000453:epidemiology; D025063:Chromosome Disorders; D004314:Down Syndrome / Q000453:epidemiology; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000453:epidemiology* / Q000235:genetics; D008297:Male; D012383:Romania; D012737:Sex Factors