1. 4. Centers for Disease Control and Prevention. Percentage of Adults Who Were Current, Former, or Never Smokers, Overall and by Sex, Race, Hispanic Origin, Age, Education, and Poverty Status: National Health Interview Surveys, Selected Years-United States, 1965-2004. Available at: http://www.cdc.gov/tobacco/data_statistics/tables/adult/table_2htm (accessed 14 June 2007).
2. Eliminating tobacco-related health disparities: directions for future research;Fagan;Am J Public Health,2004