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Han KK, Soares JM Jr, Haidar MA, de Lima GR, Baracat EC.Han KK, et al.Obstet Gynecol. 2002 Mar;99(3):389-94. doi: 10.1016/s0029-7844(01)01744-6.Obstet Gynecol. 2002.PMID: 11864664Clinical Trial.