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Kaplan-Meier plot of PFS (A) and TTST (B) in EGFR-mutated advanced NSCLC patients with or without acquired T790M mutation. PFS, progression-free survival from the EGFR-TKI treatment to PD or death; TTST, time to subsequent treatment from the EGFR-TKI treatment to subsequent treatment or death; CI, confidence interval.
