Allen, J. ., Farrelly, M. ., Duke, J. ., Kamyab, K. ., Nonnemaker, J. ., Wylie, S. ., … Gourdet, C. . (2018). Perceptions of the relative harmfulness of marijuana and alcohol among adults in Oregon. Preventive Medicine. https://doi.org/10.1016/j.ypmed.2018.01.001 (Original work published 2018)