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Age-dependent regression analysis of male gonadal axis.
Keenan DM, Veldhuis JD. Keenan DM, et al. Am J Physiol Regul Integr Comp Physiol. 2009 Nov;297(5):R1215-27. doi: 10.1152/ajpregu.90800.2008. Epub 2009 Jul 8. Am J Physiol Regul Integr Comp Physiol. 2009. PMID: 19587110 Free PMC article.