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Ceelen M, van Weissenbruch MM, Prein J, Smit JJ, Vermeiden JP, Spreeuwenberg M, van Leeuwen FE, Delemarre-van de Waal HA.Ceelen M, et al.Hum Reprod. 2009 Nov;24(11):2788-95. doi: 10.1093/humrep/dep273. Epub 2009 Aug 1.Hum Reprod. 2009.PMID: 19648588