Health care expenditures in the united states: rationing of health care and mandatory preadmission authorization.
D006264:Health Benefit Plans, Employee; D006296:Health Services / Q000191:economics* / Q000331:legislation & jurisprudence / Q000592:standards; D006801:Humans; D007902:Length of Stay / Q000191:economics; D008484:Medicaid; D014481:United States