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Use of letrozole in assisted reproduction: a systematic review and meta-analysis.
Requena A, Herrero J, Landeras J, Navarro E, Neyro JL, Salvador C, Tur R, Callejo J, Checa MA, Farré M, Espinós JJ, Fábregues F, Graña-Barcia M; Reproductive Endocrinology Interest Group of Spanish Society of Fertility. Requena A, et al. Among authors: grana barcia m. Hum Reprod Update. 2008 Nov-Dec;14(6):571-82. doi: 10.1093/humupd/dmn033. Epub 2008 Sep 23. Hum Reprod Update. 2008. PMID: 18812422 Free PMC article. Review.