Drug economics and the elderly: prescriptions for change.
D000368:Aged; D003365:Costs and Cost Analysis / Q000639:trends; D003625:Data Collection; D005252:Fees, Pharmaceutical; D005102:Health Expenditures / Q000639:trends*; D006801:Humans; D007356:Insurance, Pharmaceutical Services; D006278:Medicare; D011306:Prescription Fees; D014481:United States