title: Changes since the turn of the century.
authors.affiliation: Department of Pharmacy Practice.
authors.forename: Pete
authors.initials: P
authors.lastname: Penna
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D007356:Insurance, Pharmaceutical Services / Q000639:trends*; D008329:Managed Care Programs; D006278:Medicare; D010593:Pharmaceutical Services / Q000639:trends*; D014481:United States