title: The reinforcing functions of drugs and assessment of abuse liability.
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D006801:Humans; D012054:Reinforcement, Psychology; D012107:Research Design; D012307:Risk Factors; D012646:Self Administration; D019966:Substance-Related Disorders / Q000209:etiology* / Q000503:physiopathology