Mental retardation: severity and survival.
UNUM Life Insurance Company of America, Portland, Maine.
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Kita
D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D002648:Child; D006801:Humans; D008607:Intellectual Disability / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D007360:Intelligence; D009048:Motor Skills; D015996:Survival Rate; D014481:United States