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. 2020 Oct 30;10:1583. doi: 10.3389/fonc.2020.01583

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Copyright © 2020 Cheng, Kong, Wang, Fang 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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Comparison of overall survival between patients receiving chemotherapy and those not receiving chemotherapy or unknown. (A) There was no significant difference between the two treatment groups when RS of 0 to 10 (P = 0.871). (B) There was a significant difference when RS of 11 to 25 (P = 0.005). (C) There was a significant difference when RS ≥ 26 (P = 0.006).