title: Limited Medicare ACO quality data show sharp variations in performance.
authors.forename: Melanie
authors.initials: M
authors.lastname: Evans
mesh_terms: D060866:Accountable Care Organizations; D017598:Efficiency, Organizational / Q000706:statistics & numerical data; D006278:Medicare; D011787:Quality of Health Care / Q000592:standards* / Q000706:statistics & numerical data; D013223:Statistics as Topic; D014481:United States