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Your query returned 4 citations.

1.
2016
Keyes, Katherine M.,  Wall, Melanie,  Cerdá, Magdalena,  Schulenberg, John,  O'Malley, Patrick M.,  Galea, Sandro,  Feng, Tianshu,  Hasin, Deborah S. How does state marijuana policy affect US youth? Medical marijuana laws, marijuana use and perceived harmfulness: 1991?2014. Addiction. 111, (12), 2187-2195.
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3.
2011
Keyes, Katherine M.,  Schulenberg, John E.,  O'Malley, Patrick M.,  Johnston, Lloyd D.,  Bachman, Jerald G.,  Li, Guohua,  Hasin, Deborah . The social norms of birth cohorts and adolescent marijuana use in the United States, 1976-2007. Addiction. 106, (10), 1790-1800.
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4.
2003
Wallace, J.M., Jr.,  Bachman, Jerald G.,  O'Malley, Patrick M.,  Schulenberg, John E.,  Cooper, S.M.,  Johnston, Lloyd D. Gender and ethnic differences in smoking, drinking, and illicit drug use among American 8th, 10th and 12th grade students, 1976-2000. Addiction. 98, 225-234.
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