Citation: Goodwin RD, Pacek LR, Copeland J, Moeller SJ, Dierker L, Weinberger A, Gbedemah M, Zvolensky MJ, Wall MM, Hasin DS. Trends in Daily Cannabis Use Among Cigarette Smokers: United States, 2002-2014. Am J Public Health. 2017 Nov 21;e1-e6. Doi : 10.2105/AJPH.2017.304050