1. Buckley
DI
, AnsariM, ButlerM, WilliamsC, ChangC.
Agency for Healthcare Research and Quality. Methods Guide for Comparative Effectiveness Reviews. January 2013. AHRQ Publication No. 13-EHC023-EF. Available from: http://www.effectivehealthcare.ahrq.gov/reports/final.cfm.
2. Dietary guidelines for Americans, 2010;USDA and US Department of Health and Human Services,2010
3. US Department of Health and Human Services, Agency for Healthcare Research and Quality. How are research topics chosen?2012. Available from: http://effectivehealthcare.ahrq.gov/index.cfm/submit-a-suggestion-for-research/how-are-research-topics-chosen/ (accessed 14 May 2013).