FYI for ref 4
CONCLUSION 14-1 There is limited evidence of a statistical association between cannabis use and the initiation of tobacco use.
CONCLUSION 14-2 There is limited evidence of a statistical association between cannabis use and changes in the rates and use patterns of other licit and illicit substances.
CONCLUSION 14-3 There is moderate evidence of a statistical association between cannabis use and the development of substance dependence and/or a substance abuse disorder for substances, including alcohol, tobacco, and other illicit drugs.
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