title: Controlling for patient risk in volume-outcome studies.
authors.forename: Vivian
authors.initials: V
authors.lastname: Ho
mesh_terms: D002140:California; D001026:Coronary Artery Bypass / Q000401:mortality; D017052:Hospital Mortality; D006801:Humans; D015233:Models, Statistical; D020379:Risk Adjustment; D018570:Risk Assessment; D012307:Risk Factors; D014481:United States