The age distribution of mental retardation.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003467:Cultural Deprivation; D004777:Environment; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000453:epidemiology*; D007360:Intelligence; D007398:Interpersonal Relations