The Government Accountability Office (GAO) has released a report on the cost-effectiveness and/or cost savings of preventive services and whether or not the service had been recommended by the U.S. Preventive Services Task Force. In doing so, GAO "conducted a literature review of articles about U.S. preventive services in meta-analyses or comparative studies in peer-reviewed journals published between January 2007 and April 2014 that addressed cost-effectiveness or cost savings."