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Kaplan-Meier estimates of progression-free survival (PFS, A) and overall survival (OS, B) for gefitinib-responders. Median PFS was 13.8 months (95% CI = 11.4 to 16.2 months) and median OS was 29.2 months (95% CI = 22.1 to 36.4 months). Bars indicate censored cases.
