Managed care. States move to tighten their grip on HMOs.
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D002140:California; D005161:Facility Regulation and Control / Q000458:organization & administration*; D006801:Humans; D008329:Managed Care Programs / Q000458:organization & administration*; D008404:Massachusetts; D011785:Quality Assurance, Health Care / Q000458:organization & administration*; D013219:State Government