title: A different HMO.
authors.forename: C G
authors.initials: CG
authors.lastname: Lockhart
mesh_terms: D006279:Health Maintenance Organizations / Q000191:economics / Q000331:legislation & jurisprudence / Q000458:organization & administration; D006801:Humans; D010820:Physicians; D011787:Quality of Health Care; D012955:Societies, Medical; D014768:Virginia