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The long-term effects of cannabis have been the subject of ongoing debate. Given that the use of cannabis is illegal in most countries, clinical research presents a challenge and there is limited evidence from which to draw conclusions.[1] In 2017, the U.S. National Academies of Sciences, Engineering, and Medicine issued a report summarizing much of the published literature on health effects of cannabis, into categories regarded as conclusive, substantial, moderate, limited and of no or insufficient evidence to support an association with a particular outcome.[2]
- ^ "Challenges and Barriers in Conducting Cannabis Research". The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research. National Academies of Sciences, Engineering, and Medicine/National Academies Press. 2017. Archived from the original on 2021-02-26. Retrieved 2021-04-11.
- ^ Cite error: The named reference
National_Academies_2017was invoked but never defined (see the help page).