1. Agency for Healthcare Research and Quality [AHRQ] 2009a Medical Expenditure Panel Survey. “MEPS-HC Sample Sizes” http://meps.ahrq.gov/mepsweb/survey_comp/hc_sample_size.jsp
2. Agency for Healthcare Research and Quality [AHRQ] 2009b Medical Expenditure Panel Survey. “Survey Background” http://meps.ahrq.gov/mepsweb/about_meps/survey_back.jsp#household
3. American Dental Association [ADA] 2012a Breaking Down Barriers to Oral Health for All Americans. The Role of Finance http://www.ada.org/sections/advocacy/pdfs/7170_Breaking_Down_Barriers_Role_of_Finance-FINAL4-26-12.pdf
4. Separating Fact from Fiction: Use of High-Level Evidence from Research Syntheses to Identify Diseases and Disorders Associated with Periodontal Disease;Azarpazhooh;Journal of the Canadian Dental Association,2012