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Yonkers KA, Brown C, Pearlstein TB, Foegh M, Sampson-Landers C, Rapkin A.Yonkers KA, et al. Among authors: sampson landers c.Obstet Gynecol. 2005 Sep;106(3):492-501. doi: 10.1097/01.AOG.0000175834.77215.2e.Obstet Gynecol. 2005.PMID: 16135578Clinical Trial.