title: [Conditional stimulus or conditional reinforcer? The current trend in the renewed study on drug dependence].
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Hironaka
mesh_terms: D000818:Animals; D003213:Conditioning, Psychological / Q000502:physiology*; D003463:Cues; D006801:Humans; D010812:Physical Stimulation; D012054:Reinforcement, Psychology; D019966:Substance-Related Disorders / Q000503:physiopathology*