The incidence of speech and language problems in the mentally retarded.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004495:Education of Persons with Intellectual Disabilities; D006311:Hearing Disorders / Q000453:epidemiology; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000150:complications*; D007806:Language Disorders / Q000453:epidemiology*; D008875:Middle Aged; D013064:Speech Disorders / Q000453:epidemiology*; D014481:United States