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Review fails to advise on cannabis use because of poor research

BMJ 2017; 356 doi: https://doi.org/10.1136/bmj.j248 (Published 16 January 2017) Cite this as: BMJ 2017;356:j248
  1. Bob Roehr
  1. Washington DC

The chair of a group brought together to develop public policy and medical guidelines on the use of cannabis has said that her task had been thwarted by the poor quality of the evidence.

Marie McCormick, a professor of pediatrics and chair of the department of maternal and child health at the Harvard School of Public Health, chaired the US National Academies of Sciences, Engineering, and Medicine committee that examined the topic and issued a report on 12 January.1 She concluded: “The lack of any aggregated knowledge of cannabis related health effects has led to uncertainty about what, if any, are the harms or benefits of its use.” …

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