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Oliveira MM, Farias-Eisner RP, Pitkin RM.Oliveira MM, et al. Among authors: pitkin rm.Am J Obstet Gynecol. 1995 Jun;172(6):1889-92; discussion 1892-4. doi: 10.1016/0002-9378(95)91428-5.Am J Obstet Gynecol. 1995.PMID: 7778649Clinical Trial.