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Johnson, Julie K and Doonan, Samantha M (2021) Cannabis policy heterogeneity and effects on research—complexity expected. JAMA Network Open , 4 , (3) , e212545.
Geissler, Kimberley H and Kaizer, Kia and Johnson, Julie K and Doonan, Samantha M and Whitehill, Jennifer M (2020) Evaluation of availability of survey data about cannabis use. JAMA Network Open , 3 , (6 e206039) , e206039.