Fig. 2From: A real-world cohort study of first-line afatinib in patients with EGFR-mutant advanced non-small cell lung cancer in VietnamKaplan–Meier curve of TTF among patients stratified by dosage factors: starting dose (A), dose reduction (B), dose adjustment after one month (C) and optimal dose (D). Abbreviations: TTF: time-to-failure treatmentBack to article page