title: Marihuana, alcohol, and polydrug use: human self-administration studies.
mesh_terms: D000428:Alcohol Drinking; D000437:Alcoholism; D002188:Cannabis; D003365:Costs and Cost Analysis; D006801:Humans; D012055:Reinforcement Schedule; D012646:Self Administration; D019966:Substance-Related Disorders / Q000523:psychology*; D014937:Work