How to choose an HMO.
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D000328:Adult; D000368:Aged; D002648:Child; D002908:Chronic Disease; D003657:Decision Making; D005192:Family Health; D017408:Guidelines as Topic; D006279:Health Maintenance Organizations / Q000592:standards*; D006301:Health Services Needs and Demand; D006801:Humans; D007255:Information Services; D011787:Quality of Health Care; D012179:Retirement; D014481:United States