title: Appropriate use criteria in echocardiography: delphic or not?
authors.forename: James D
authors.initials: JD
authors.lastname: Thomas
mesh_terms: D002309:Cardiology / Q000592:standards*; D004452:Echocardiography / Q000592:standards*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D014481:United States