Pepper, J. ., Lee, Y. ., Eggers, M. ., Allen, J. ., Thompson, J. ., & Nonnemaker, J. . (2020). Perceptions of U.S. and Canadian Cannabis Package Warnings Among U.S. Adults. Drug and Alcohol Dependence, 217, 108275. https://doi.org/10.1016/j.drugalcdep.2020.108275 (Original work published 2020)