title: Below-average intelligence and mental retardation.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000453:epidemiology*; D007361:Intelligence Tests; D008297:Male; D011594:Psychometrics; D012917:Social Adjustment; D013548:Sweden