title: Performance on a verbal learning task by subjects of heavy past marijuana usage.
mesh_terms: D000704:Analysis of Variance; D002188:Cannabis / Q000494:pharmacology*; D013759:Dronabinol / Q000494:pharmacology; D006801:Humans; D007360:Intelligence / Q000187:drug effects; D008297:Male; D008568:Memory / Q000187:drug effects*; D010919:Placebos; D019966:Substance-Related Disorders; D014706:Verbal Learning / Q000187:drug effects*
chemical_list: D010919:Placebos; D013759:Dronabinol