title: The challenge of quality versus quantity in echocardiography.
authors.affiliation: Div. of Cardiovascular Medicine, Stanford University School of Medicine, CA 94305.
authors.forename: R L
authors.initials: RL
authors.lastname: Popp
mesh_terms: D004452:Echocardiography / Q000191:economics / Q000295:instrumentation / Q000706:statistics & numerical data; D006801:Humans; D011787:Quality of Health Care