title: Two years in review.
authors.forename: Elizabeth F
authors.initials: EF
authors.lastname: McIlwain
mesh_terms: D004452:Echocardiography / Q000592:standards* / Q000639:trends*; D004502:Education, Medical, Continuing / Q000639:trends*; D008119:Lobbying; D017410:Practice Guidelines as Topic; D012955:Societies, Medical / Q000639:trends*; D014481:United States