Erratum

In the article "Sex Differences in Brain and Plasma β-Endorphin Content following Testosterone, Dihydrotestosterone and Estradiol Administration to Gonadectomized Rats" [Neuroendocrinology. 2009;89(4):411-423; https://doi.org/10.1159/000209506] by Pluchino et al., the following should be noted.Following publication, it was brought to the journal's attention that the data presented in Table 1 of this article had been previously published by the authors [1], which was not referenced in the article.When asked to comment, the authors stated that in order to limit the number of animals used in the experiments, the same cohort of rats was employed for the different analyses and that the data is repeated solely for descriptive purposes, to document well-expected hormonal changes of animals undergoing gonadectomy or hormonal replacement therapy.Discrepancies between the articles in the following reported values are noted:1.Testosterone, ng/mL for OVX + T (10 μg/kg/day) group2.Estradiol, pg/mL for OVX + Estradiol group3.Testosterone, ng/mL for Gonad intact male group4.Testosterone, ng/mL for OCX + T (1 mg/kg/day) groupThe authors state these are due to typographical errors and the data in the Neuroendocrinology article should be considered the correct version.This notice is to inform readers of the known data republication and discrepancies in the reported values.