“…The concurrent use of these tobacco products may increase adolescents' risk for developing nicotine dependence (Jordan & Delnevo, 2010;Knishkowy & Amitai, 2005), thus making it difficult to quit smoking and achieve long-term abstinence (Curry, Sporer, Pugach, Campbell, & Emery, 2007). A growing body of literature has examined the development and progression of nicotine dependence among adolescent cigarette smokers (DiFranza et al, 2007;O'Loughlin et al, 2002).…”