Quality in managed care: promise versus reality.
Ellerbeck
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EF
D000368:Aged; D000553:Ambulatory Care / Q000592:standards*; D006279:Health Maintenance Organizations / Q000592:standards; D006801:Humans; D008329:Managed Care Programs / Q000592:standards*; D006278:Medicare; D009203:Myocardial Infarction / Q000534:rehabilitation / Q000628:therapy*; D011787:Quality of Health Care; D014481:United States