1. Besaratinia A, Tommasi S (2014) Electronic cigarettes: the road ahead. Prev Med 66:65–67
2. Schoenborn CA, Gindi RM (2015) Electronic cigarette use among adults: United States, 2014. NCHS data brief, pp 1–8
3. Singh T, Arrazola RA, Corey CG et al (2016) Tobacco use among middle and high school students—United States, 2011–2015. MMWR 65:361–367
4. Zhu SH, Sun JY, Bonnevie E et al (2014) Four hundred and sixty brands of e-cigarettes and counting: implications for product regulation. Tob Control. 23(Suppl 3):iii3–iii9
5. Centers for Disease Control and Prevention (2013) Tobacco product use among middle and high school students—United States, 2011 and 2012. Morb Mortal Wkly Rep 62(45):893–7. Accessed 15 Jun 2017