title: Outcome versus volume in coronary bypass operations.
authors.forename: R M
authors.initials: RM
authors.lastname: Becker
mesh_terms: D002983:Clinical Competence; D001026:Coronary Artery Bypass / Q000401:mortality / Q000706:statistics & numerical data*; D006801:Humans; D006278:Medicare / Q000706:statistics & numerical data; D017063:Outcome Assessment, Health Care; D014481:United States