Testing the Gateway hypothesis
A twin study of early cannabis use and subsequent use and abuse/dependence of other illicit drugs
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Risk for initiation of substance use as a function of age of onset of cigarette, alcohol and cannabis use: findings in a Midwestern female twin cohort
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Relationship between adolescent marijuana use and young adult illicit drug use
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Cannabis use and psychosocial adjustment in adolescence and young adulthood
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Does cannabis use encourage other forms of illicit drug use?
Fergusson DM, Horwood LJ in Addiction, 2000 Apr;95(4):505-20
Cannabis use and other illicit drug use: testing the cannabis gateway hypothesis
Fergusson DM, Boden JM, Horwood LJ, in Addiction, 2006 Apr;101(4):556-69
Is cannabis a gateway drug? Testing hypotheses about the relationship between cannabis use and the use of other illicit drugs
Hall WD, Lynskey M, in Drug and alcohol review, 2005 Jan;24(1):39-
Are cannabis users exposed to other drug use opportunities? Investigation of high-risk drug exposure opportunities among young cannabis users in London
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Predictors of marijuana use in adolescents before and after licit drug use: examination of the gateway hypothesis
Tarter RE, Vanyukov M, Kirisci L, Reynolds M, Clark DB in The American journal of psychiatry, 2006 Dec;163(12):2134-40
Escalation of drug use in early-onset cannabis users vs co-twin controls
Lynskey MT, Heath AC, Bucholz KK, Slutske WS, Madden PA, Nelson EC, Statham DJ, Martin NG ", in JAMA : the journal of the American Medical Association, 2003 Jan 22-29;289(4):427-33