Fig. 2From: Efficacy of platinum agents for stage III non-small-cell lung cancer following platinum-based chemoradiotherapy: a retrospective studyKaplan–Meier curves of overall survival from the beginning of second-line chemotherapy until death or the last follow-up in patients treated with platinum-based chemotherapy and single agent in second-line setting. Tick marks represent data censored at the last time the patient was known to be alive. Abbreviations: CI, confidence interval; HR, hazard ratio; OS, overall survivalBack to article page