title: Pre-emptive extradural analgesia.
authors: O H
authors: OH
authors: Wilder-Smith
authors: A
authors: A
authors: Borgeat
authors: M
authors: M
authors: Tramèr
authors: D R
authors: DR
authors: Morel
mesh_terms: D000005:Abdomen / Q000601:surgery; D015360:Analgesia, Epidural; D002045:Bupivacaine / Q000008:administration & dosage; D006801:Humans; D009020:Morphine / Q000008:administration & dosage; D010149:Postoperative Pain / Q000517:prevention & control*
chemical_list: D009020:Morphine; D002045:Bupivacaine