Fig. 2From: Association between number of dissected lymph nodes and survival in stage IA non-small cell lung cancer: a propensity score matching analysisKaplan–Meier curves showing the effect of NLNs on CSS (a) and OS (b) of unmatched patients with stage IA ≤ 2-cm NSCLC. Kaplan–Meier curves showing the effect of NLNs on CSS (c) and OS (d) of matched patients with stage IA ≤ 2-cm NSCLCBack to article page