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2. Awareness and ever-use of electronic cigarettes among u.S. Adults, 2010–2011;BA King;Nicotine & Tobacco Research,2013
3. Trends in electronic cigarette use among u.S. Adults: Use is increasing in both smokers and nonsmokers;RC Mcmillen,2015
4. Tobacco use among middle and high school students—united states, 2011–2014;RA Arrazola;MMWR Morb Mortal Wkly Rep,2015
5. Fda announces comprehensive regulatory plan to shift trajectory of tobacco-related disease, death,2017