title: [Preliminary trial of peridural morphine in the relief of postoperative pain].
mesh_terms: D000328:Adult; D000368:Aged; D004311:Double-Blind Method; D006801:Humans; D007278:Injections, Spinal; D008875:Middle Aged; D009020:Morphine / Q000008:administration & dosage* / Q000378:metabolism; D010149:Postoperative Pain / Q000188:drug therapy*; D011957:Receptors, Opioid / Q000032:analysis
chemical_list: D011957:Receptors, Opioid; D009020:Morphine
vernacular_title: Considerações sobre um ensaio preliminar com morfina peridural no alívio da dor post-operatória.