1. Preventive Services. 2012. www.ahrq.gov/clinic/uspstfix.htm.
2. Recommendation and Guidelines: Advisory Committee on Immunization Practices (ACIP). 2010. www.cdc.gov/vaccines/recs/ACIP/default.htm.
3. Guide to Community Preventive Services. 2011. www.thecommunityguide.org/index.html.
4. Use of selected clinical preventive services among adults—U.S., 2007-2010;Frieden;MMWR Morb Mortal Wkly Rep,2012
5. The quality of health care delivered to adults in the U.S.;McGlynn;N Engl J Med,2003