1. WHO , Alcohol, drugs and addictive behaviours (ADA) , https://www.who.int/teams/mental-health-and-substance-use/alcohol-drugs-and-addictive-behaviours/drugs-(psychoactive)/cannabis , accessed 12 November 2020
2. Annual prevalence of the use of drugs by region and globally , https://dataunodc.un.org/drugs/prevalence_regional , accessed 12 November 2020
3. Health Canada , Canadian Cannabis Survey 2019 – Summary , https://www.canada.ca/en/health-canada/services/publications/drugs-health-products/canadian-cannabis-survey-2019-summary.html , accessed 12 November 2020
4. Canadian Cannabis Survey 2021: Summary , 2021
5. Indoor cannabis smoke and children's health