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. 2021 Apr 30;8:666332. doi: 10.3389/fsurg.2021.666332

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Copyright © 2021 Han, Wu, Sun, Chong, Kang, Liu and Zhang.

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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Survival curves after propensity score matching. (A,E) Surgery vs. no surgery for IIIB patients. (B,F) Chemotherapy vs. chemotherapy plus radiotherapy for IIIB patients. (C,G) Surgery vs. no surgery for IV patients. (D,H) Chemotherapy vs. chemotherapy plus radiotherapy for IV patients. (I,J) Stage IIIB vs. IV.