Fig. 3From: Feasibility and effectiveness of afatinib for poor performance status patients with EGFR-mutation-positive non-small-cell lung cancer: a retrospective cohort studyKaplan-Meier survival curves for PFS (A and C) and OS (B and D) among patients stratified according to pleural metastasis (A and B) and brain metastasis (C and D). PFS, progression-free survival; OS, overall survivalBack to article page