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Lewis EI, Chason RJ, DeCherney AH, Armstrong A, Elkas J, Venkatesan AM.Lewis EI, et al.Fertil Steril. 2013 Jun;99(7):2017-24. doi: 10.1016/j.fertnstert.2013.01.147. Epub 2013 Mar 5.Fertil Steril. 2013.PMID: 23465706Free PMC article.Review.