Fertility and Sterility (2014) - Comments
pubmed: 24524834  doi: 10.1016/j.fertnstert.2013.12.041  issn: 1556-5653  issn: 0015-0282 

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Kelly R. Evenson, Kathryn C. Calhoun, Amy H. Herring, David Pritchard, Fang Wen, Anne Z. Steiner