title: Psychological approaches to opiate dependence and self-administration by laboratory animals.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D005502:Food; D000882:Haplorhini; D006801:Humans; D008691:Methadone / Q000008:administration & dosage; D009020:Morphine / Q000008:administration & dosage*; D009021:Morphine Dependence; D012054:Reinforcement, Psychology; D012651:Self Medication; D013375:Substance Withdrawal Syndrome / Q000517:prevention & control; D014867:Water
chemical_list: D014867:Water; D009020:Morphine; D008691:Methadone