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The expression of PD‐L1 and infiltration of CD4+, CD8+ T cells within NSCLC patients harboring Ex20ins of EGFR or HER2. NSCLC tumors with EGFR Ex20ins: (a) Positive expression of PD‐L1; (b) presence of CD4+ TILs; (c) presence of CD8+ TILs. NSCLC tumors with HER2 Ex20ins: (d) Positive expression of PD‐L1; (e) presence of CD4+ TILs; and (f) presence of CD8+ TILs. (*200).
