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. 2021 Oct 1;11:706910. doi: 10.3389/fonc.2021.706910

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Copyright © 2021 Wei, Feng, Weng, Xu, Jin, Wang, Cui, Ruan, Luo, Li and Peng

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 fixed effects meta-analysis on the efficacy of circulating DNA (ctDNA) for progression-free survival (PFS) at different time points.