Variations in Medicare expenditures per elder.
D000368:Aged; D002391:Catchment Area, Health; D005260:Female; D005102:Health Expenditures; D006296:Health Services / Q000706:statistics & numerical data*; D006801:Humans; D007349:Insurance, Health, Reimbursement; D008297:Male; D006278:Medicare / Q000191:economics*; D014481:United States