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. 2021 May 12;12:524762. doi: 10.3389/fendo.2021.524762

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Copyright © 2021 Hooper, Mallard, Wight, Conway, Pujalte, Pontius, Saenz, Hackney, Tenforde and Ackerman

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Serum Ferritin (A), Triiodothyronine (B) and Vitamin D (C) (mean ± 95% CI) of 7 female NCAA Division 1 collegiate cross country and track and field athletes before (Pre XC) and after (Post XC) cross country season, and before track (Pre Track) season. b= statistically significantly (p<0.05) different from corresponding Post XC.