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. 2021 Sep 7;12:693796. doi: 10.3389/fphar.2021.693796

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Copyright © 2021 Wang, Zhang, Guo, Pu, Riaz, Feng, Fang, Song, Liang, Wu, Pan and Tang.

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 studies comparing HCQ group and the non-HCQ group, examining the effect on pSS (including Schirmer’s test, uSFR, CRP, ESR, IgG, IgM and IgA). (A) Schirmer’s test. (B) uSFR. (C) CRP. (D) ESR. (E) IgG. (F) IgM. (G) IgA.