title: [Some questions to Dr. Takigawa's article].
authors.affiliation: Kato Clinic.
authors.forename: S
authors.initials: S
authors.lastname: Kato
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D006801:Humans; D012054:Reinforcement, Psychology; D012201:Reward; D019966:Substance-Related Disorders