title: Limitations of an extinction approach to narcotic antagonist treatment.
mesh_terms: D000359:Aftercare; D000367:Age Factors; D002986:Clinical Trials as Topic; D003213:Conditioning, Psychological; D004334:Drug Administration Schedule; D005108:Extinction, Psychological; D005500:Follow-Up Studies; D003932:Heroin / Q000008:administration & dosage; D006556:Heroin Dependence / Q000534:rehabilitation*; D006801:Humans; D009271:Naltrexone / Q000008:administration & dosage / Q000627:therapeutic use; D009292:Narcotic Antagonists / Q000627:therapeutic use*; D012107:Research Design; D012646:Self Administration; D013997:Time Factors
chemical_list: D009292:Narcotic Antagonists; D009271:Naltrexone; D003932:Heroin