Frequency of adolescent cannabis smoking and vaping in the United States: Trends, disparities and concurrent substance use, 2017–19 Posted on June 23, 2022June 23, 2022 By sdargoltz Katherine M. Keyes, Noah T. Kreski, Hadley Ankrum, Magdalena Cerdá, Qixuan Chen, Deborah S. Hasin, Silvia S. Martins, Mark Olfson, Richard Miech Access article Cannabis and Cannabinoids, Chemistry, Crime Scene Investigation and Reconstruction, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology