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Distribution of EGFR ex20ins mutants in 73 NSCLC patients (I–IIIA) according to different classes by functional classification [(A) left side)] and 119 advanced NSCLC patients (IIIB–IV) according to different classes by functional classification [(A) right side)]. Number of ex20ins mutants (B). EGFR ex20ins, epidermal growth factor receptor exon 20 insertion; NSCLC, non-small-cell lung cancer.
