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4. Centers for Disease Control and Prevention. Trends in current cigarette smoking among high school students and adults, United States, 1965–2011. Office of Smoking and Health, National Center for Chronic Disease Prevention and Health Promotion. Available at: http://www.cdc.gov/tobacco/data_statistics/tables/trends/cig_smoking/index.htm. Accessed June 10, 2012.
5. Centers for Disease Control and Prevention. Tobacco use: targeting the nation’s leading killer. National Center for Chronic Disease Prevention and Health Promotion. Available at: http://www.cdc.gov/chronicdisease/resources/publications/aag/osh.htm. Accessed May 10, 2012.