“…Other recent studies show that hookah (water pipe) use is similarly associated with greater marijuana use among U.S. high school seniors and college students (Goodwin et al, 2014;Palamar, Zhou, Sherman, & Weitzman, 2014). Emerging research on e-cigarettes has documented an association between e-cigarette use and use of alcohol, marijuana, and other illicit substances (Demissie, Everett Jones, Clayton, & King, 2017;Westling, Rusby, Crowley, & Light, 2017), although much of this research compares ecigarette use to cigarette use or dual use of both cigarettes and e-cigarettes (Dunbar et al, 2017;Kristjansson, Mann, & Smith, 2017;McCabe, West, Veliz, & Boyd, 2017).…”