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. 2022 Mar 2;12:806085. doi: 10.3389/fcimb.2022.806085

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Copyright © 2022 Diao, Zhao, Chen, Wang, Chen, Yang, Sun, Shi, Li, Shi, Gong and Du

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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Sensitivity analysis. After removing one study at a time, the remaining studies were re-combined using a random-effects model to verify the impact of a single study on the overall results.