“…On the other hand, the Institute of Medicine (IOM) warns that availability of other tobacco products may have a net negative impact on public health since smokers might delay or refrain from quitting, former smokers may be drawn back to tobacco use, and nonsmokers might be encouraged to start using tobacco (IOM, 2012). Therefore, evaluating the net impact of these other tobacco products (hereafter referred to as unconventional tobacco products) on public health is an important and complex question (Bombard, Rock, Pederson, & Asman, 2008;Hatsukami et al, 2002;Hatsukami, Ebbert, Feuer, Stepanov, & Hecht, 2007;O'Connor, 2012;Shiffman et al, 2002).…”