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. 2019 Nov 18;7(11):239. doi: 10.3390/sports7110239

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Serum 25(OH)D Changes in WBB (n = 9). *Each line represents an individual WBB athlete. July is T1 (summer off-season) and October is T2 (autumn pre-season).