title: Natural history of mental retardation: some aspects of epidemiology.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003156:Community Mental Health Services; D004314:Down Syndrome / Q000150:complications; D004495:Education of Persons with Intellectual Disabilities; D005006:Ethnicity; D005260:Female; D006760:Hospitalization; D006778:Hospitals, Psychiatric; D006801:Humans; D007223:Infant; D007239:Infections / Q000150:complications; D008607:Intellectual Disability / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D007360:Intelligence; D008297:Male; D011041:Poisoning / Q000150:complications; D012114:Residential Treatment; D014481:United States; D014947:Wounds and Injuries / Q000150:complications