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. 2020 Jul 13;8:702. doi: 10.3389/fbioe.2020.00702

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Copyright © 2020 Zhu, Meng, Ruan, Lu, Yan and Wang.

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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(A) Kaplan–Meier curves of the overall survival time for comparing the three subgroups. (B) The forest plot shows some clinical variables affecting patients’ overall survival.