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A randomized, placebo controlled, trial of preoperative sustained release Betamethasone plus non-controlled intraoperative Ketorolac or Fentanyl on pain after diagnostic laparoscopy or laparoscopic tubal ligation [ISRCTN52633712]
BMC Anesthesiology 2003, 3:3 doi:10.1186/1471-2253-3-3
