Adverse effects of cannabis

@article{Hall1998AdverseEO,
  title={Adverse effects of cannabis},
  author={Wayne D. Hall and Nadia Solowij},
  journal={The Lancet},
  year={1998},
  volume={352},
  pages={1611-1616}
}

Figures from this paper

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TLDR
A high proportion of people who have a serious mental illness also use non-prescribed psychoactive drugs, particularly cannabis, and this association is perhaps most apparent, and possibly also has the greatest implications for health, in relation to tobacco use.
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