Frequency of adolescent cannabis smoking and vaping in the United States: Trends, disparities and concurrent substance use, 2017-19 - Keyes, Katherine M.; Miech, Richard; Olfson, Mark; Martins, Silvia S.; Hasin, Deborah S.; Chen, Qixuan; Cerda, Magdalena; Ankrum, Hadley; Kreski, Noah T. (Addiction, 2022)