Low dose intrathecal morphine for caesarean section.
D000773:Anesthesia, Obstetrical / Q000379:methods*; D000775:Anesthesia, Spinal / Q000379:methods*; D002585:Cesarean Section; D005260:Female; D006801:Humans; D009020:Morphine; D011247:Pregnancy
D009020:Morphine