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. 2021 Oct 12;1:706835. doi: 10.3389/fbinf.2021.706835

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Copyright © 2021 Min, Xunlei, Haizhen, Wenjing, Haiyan, Xiaoyun, Jianyun, Xudong and Aiguo.

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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Forrest plot of HR for OS (A) and DFS (B). Size of the square indicates the relative contribution of each study. The solid horizontal line represents 95% confidence interval of each study. The diamond indicates pooled studies.