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. 2021 Apr 8;9(4):e002230. doi: 10.1136/jitc-2020-002230

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See http://creativecommons.org/licenses/by-nc/4.0/.

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(A) Comparison of PD-L1 TPS between primary and metastatic sites; all subtypes. (B) PD-L1 TPS stratified by sampling site. (C) Comparison of PD-L1 TPS between primary and metastatic sites; non-squamous NSCLC. (D) Comparison of PD-L1 TPS between primary and metastatic sites; LUSC. LUSC, lung squamous cell carcinoma; NSCLC, non-small cell lung cancer; PD-L1, programmed death-ligand 1; TPS, tumor proportion score.