Canna~Fangled Abstracts Interaction between the Cholecystokinin and Endogenous Cannabinoid Systems in Cued Fear Expression and Extinction Retention. 2014 Sep 1. doi: 10.1038/npp.2014.225. Interaction between the Cholecystokinin and Endogenous Cannabinoid Systems in Cued Fear Expression…Freedom WaresSeptember 1, 2014