The changing state institutions for the mentally retarded.
D000293:Adolescent; D000328:Adult; D002648:Child; D002674:Child, Institutionalized; D004495:Education of Persons with Intellectual Disabilities; D005380:Financing, Government; D006778:Hospitals, Psychiatric; D006801:Humans; D008607:Intellectual Disability / Q000534:rehabilitation*; D014481:United States