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Terry KL, Missmer SA, Hankinson SE, Willett WC, De Vivo I.Terry KL, et al. Among authors: willett wc.Am J Obstet Gynecol. 2008 Jan;198(1):37.e1-8. doi: 10.1016/j.ajog.2007.05.033. Epub 2007 Nov 5.Am J Obstet Gynecol. 2008.PMID: 17981250Free PMC article.