Article

Freeman, Tom P and Craft, Sam and Wilson, Jack and Stylianou, Stephan and ElSohly, Mahmoud and Di Forti, Marta and Lynskey, Michael T (2021) Changes in delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) concentrations in cannabis over time: systematic review and meta-analysis. Addiction , 116 , (5) , pp. 1000-1010.