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. 2022 Aug 1;10:903547. doi: 10.3389/fpubh.2022.903547

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Copyright © 2022 Xie, Huang, Lou, Fu, Ni, Hong and Ruan.

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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Forest plot of the correlation between supplementary doses of vitamin D and the prognosis of depression. (A) low doses (≤2,800 IU/day); (B) high doses (>2,800 IU/day).