title: The respiratory effects of morphine during a cycle of dependence.
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002245:Carbon Dioxide / Q000494:pharmacology*; D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology; D009021:Morphine Dependence; D012119:Respiration / Q000187:drug effects*
chemical_list: D002245:Carbon Dioxide; D009020:Morphine