A systematic review and meta-analysis did not find evidence to support the hypothesis that US medical marijuana laws (MMLs) until 2014 have led to increases in adolescent marijuana use prevalence, contrary to the belief that such laws increase recreational marijuana use among adolescents.

A systematic review and meta-analysis did not find evidence to support the hypothesis that US medical marijuana laws (MMLs) until 2014 have led to increases in adolescent marijuana use prevalence, contrary to the belief that such laws increase recreational marijuana use among adolescents.: http://ift.tt/2BKuX5S Read more... http://ift.tt/2BLClxJ