title: CMS head CT rule under fire.
authors.forename: Maryn
authors.initials: M
authors.lastname: McKenna
mesh_terms: D004636:Emergency Service, Hospital / Q000331:legislation & jurisprudence* / Q000706:statistics & numerical data; D006801:Humans; D006278:Medicare / Q000331:legislation & jurisprudence / Q000592:standards; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D014481:United States