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Roberts SA, McGowan L, Mark Hirst W, Vail A, Rutherford A, Lieberman BA, Brison DR; towardSET Collaboration.Roberts SA, et al. Among authors: vail a.Hum Reprod. 2011 Mar;26(3):569-75. doi: 10.1093/humrep/deq352. Epub 2010 Dec 16.Hum Reprod. 2011.PMID: 21163856
Roberts SA, McGowan L, Vail A, Brison DR.Roberts SA, et al. Among authors: vail a.Hum Fertil (Camb). 2011 Jun;14(2):89-96. doi: 10.3109/14647273.2011.568037.Hum Fertil (Camb). 2011.PMID: 21631244Free article.