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Robert M, Soraisham A, Sauve R.Robert M, et al.Am J Obstet Gynecol. 2008 Mar;198(3):264.e1-5. doi: 10.1016/j.ajog.2007.09.033. Epub 2008 Jan 15.Am J Obstet Gynecol. 2008.PMID: 18199420