1. U.S. Census Bureau: General demographic characteristics, 2009 population estimates, United States. Available at http://factfinder.census.gov/servlet/QTTable?-ds_name=PEP_2009_EST&-qr_name=PEP_2009_EST_DP1&-geo_id=01000US . Accessed June 2011.
2. Centers for Disease Control and Prevention: Percentage of civilian, noninstitutionalized population with diagnosed diabetes, by age, United States, 1980–2009. Available at http://www.cdc.gov/diabetes/statistics/prev/national/figbyage.htm . Accessed June 2011.
3. Centers for Disease Control and Prevention: Age-adjusted percentage of civilian noninstitutionalized population with diagnosed diabetes, by sex, United States, 1980–2009. Available at http://www.cdc.gov/diabetes/statstics/prev/national/figbysex.htm . Accessed June 2011.
4. Centers for Disease Control and Prevention: Prevalence of overweight, obesity, and extreme obesity among adults: United States, trends 1976–1980 through 2007–2008. Available at http://www.cdc.gov/nchs/data/hestat/obesity_adult_07_08/obesity_adult_07_08.pdf . Accessed June 2011.
5. Flegal KM, Carroll MD, Ogden CL, et al. Prevalence and trends in obesity among US adults, 1999–2008. JAMA. 2010;303:235–41.