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Istre O, Schantz-Dunn J, Vellinga TT.Istre O, et al. Among authors: vellinga tt.Fertil Steril. 2010 Feb 1. doi: 10.1016/j.fertnstert.2009.12.028. Online ahead of print.Fertil Steril. 2010.PMID: 20117769