1. U.S. Department of Health and Human Services. National center for chronic disease prevention and health promotion, office on smoking and health: the health consequences of smoking – 50 years of progress: a report of the surgeon general. Atlanta: Department of Health and Human Services, Centers for Disease Control and Prevention (DHHS), National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health; 2014.
2. Jamal A, Agaku IT, O’Connor E, King BA, Kenemer JB, Neff L. Current cigarette smoking among adults—United States, 2005–2013. MMWR Morb Mortal Wkly Rep. 2014;63(47):1108–12.
3. Cahn Z, Siegel M. Electronic cigarettes as a harm reduction strategy for tobacco control: a step forward or a repeat of past mistakes. J Public Health Pol. 2011;32(1):16–31.
4. Goniewicz ML, Knysak J, Gawron M, Kosmider L, Sobczak A, Kurek J, Prokopowicz A, Jablonska-Czapla M, Rosik-Dulewska C, Havel C. Levels of selected carcinogens and toxicants in vapour from electronic cigarettes. Tob Control. 2014;23:133–9.
5. Hajek P, Etter J-F, Benowitz N, Eissenberg T, McRobbie H. Electronic cigarettes: review of use, content, safety, effects on smokers and potential for harm and benefit. Addiction. 2014;109(11):1801–10. doi: 10.1111/add.12659 .