title: HMO's and the cost of medical care.
mesh_terms: D000367:Age Factors; D003365:Costs and Cost Analysis; D005249:Fees and Charges; D005102:Health Expenditures; D006279:Health Maintenance Organizations / Q000191:economics*; D006760:Hospitalization; D006801:Humans; D007348:Insurance, Health; D014481:United States