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Trends in use of marijuana and attitudes toward marijuana among youth before and after decriminalization: The case of California 2007–2013 Richard A. Miech, Lloyd Johnston, Patrick M. O’Malley, Jerald G. Bachman, John Schulenberg, Megan E. Patrick International Journal of Drug Policy Volume 26, Issue 4, Pages (April 2015) DOI: /j.drugpo Copyright © 2015 Elsevier B.V. Terms and Conditions
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Fig. 1 Marijuana use and attitudes among U.S. 12th graders by year and California residency. * p≤.05; prevalence significantly different among California as compared to non-California residents in this year. ** p≤.01; prevalence significantly different among California as compared to non-California residents in this year. International Journal of Drug Policy , DOI: ( /j.drugpo ) Copyright © 2015 Elsevier B.V. Terms and Conditions
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