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Dann RB, Kelley JL, Zorn KK.Dann RB, et al. Among authors: kelley jl.Obstet Gynecol Clin North Am. 2007 Dec;34(4):667-86, viii. doi: 10.1016/j.ogc.2007.10.001.Obstet Gynecol Clin North Am. 2007.PMID: 18061863Review.