title: The fog of war and the declining prevalence of mental retardation.
authors.forename: Walton O
authors.initials: WO
authors.lastname: Schalick
mesh_terms: D002648:Child; D006293:Health Promotion; D049673:History, 20th Century; D006801:Humans; D008607:Intellectual Disability / Q000453:epidemiology* / Q000266:history / Q000517:prevention & control*; D015995:Prevalence; D014481:United States