title: The challenge of change.
authors.forename: S M
authors.initials: SM
authors.lastname: Gelfand
mesh_terms: D003695:Delivery of Health Care / Q000191:economics / Q000639:trends*; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000639:trends; D010819:Physician's Role; D014481:United States