Patterns and correlates of polytobacco use in the United States over a decade: NSDUH 2002-2011 - Fix, Brian V.; Hyland, Andrew; Yang, Ling; Ambrose, Bridget; Conway, Kevin P.; Bansal-Travers, Maansi; Smith, Danielle; Vogl, Lisa; O'Connor, Richard J. (Addictive behaviors, 2014)