title: Paul Dudley White on echocardiography. "Nobody is perfect".
authors.forename: Harvey
authors.initials: H
authors.lastname: Feigenbaum
mesh_terms: D002309:Cardiology / Q000266:history*; D004452:Echocardiography / Q000266:history*; D006331:Heart Diseases / Q000000981:diagnostic imaging / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D014481:United States