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. 2023 Jan 16;16(1):130. doi: 10.3390/ph16010130

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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Forest plot of the association of protective effect of vitamin D supplementation with mortality in patients hospitalized with COVID-19. CI, confidence interval; OR, odds ratio [26,32,36,37,38].