1. World Health Organization Tobacco fact sheet http://www.who.int/mediacentre/factsheets/fs339/en/ 2016
2. Tobacco product use among adults-United States, 2013-2014;Hu;MMWR Morb Mortal Wkly Rep,2016
3. U.S. Department of Health and Human Services The Health Consequences of Smoking-50 Years of Progress: A Report of the Surgeon General . Atlanta, GA: USDHHS, CDC, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health 2014
4. Centers for Disease Control and Prevention How Tobacco Smoke Causes Disease: The Biology and Behavioral Basis for Smoking Attributable Disease . Atlanta, GA: 2010
5. How do pregnant women justify smoking? A qualitative study with implications for nurses’ and midwives’ anti-tobacco interventions;Goszczynska;J Adv Nurs,2016