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Amaral A, Ramalho-Santos J, St John JC.Amaral A, et al.Hum Reprod. 2007 Jun;22(6):1585-96. doi: 10.1093/humrep/dem030. Epub 2007 Mar 5.Hum Reprod. 2007.PMID: 17339235
Amaral A, Lourenço B, Marques M, Ramalho-Santos J.Amaral A, et al.Reproduction. 2013 Oct 1;146(5):R163-74. doi: 10.1530/REP-13-0178. Print 2013.Reproduction. 2013.PMID: 23901129Review.