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Paired analysis of PD‐L1 expression in same‐site biopsies before and after third‐generation EGFR‐TKIs treatment. No statistically significant difference was observed in PD‐L1 expression before and after treatment. EGFR‐TKIs, epidermal growth factor receptor‐tyrosine kinase inhibitors; PD‐L1, programmed cell death‐ligand 1.
