title: XII. Effects of morphine on differentially conditioned electrodermal responses.
mesh_terms: D002986:Clinical Trials as Topic; D003213:Conditioning, Psychological / Q000187:drug effects*; D005712:Galvanic Skin Response / Q000187:drug effects*; D006801:Humans; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D010919:Placebos; D019966:Substance-Related Disorders
chemical_list: D010919:Placebos; D009020:Morphine