Overall (left hand plots) and recurrence-free survival (right hand plots;
Kaplan-Meier plots, showing sample counts and statistical significance according
to Wilcoxon-weighted log-rank test p-values) for each of 4 lung cancer
subgroups, by stage and treatment, from top most to bottom most plots: stage
I-II not given chemotherapy, stage I-II given chemotherapy, stage III-IV not
given chemotherapy, and stage III-IV given chemotherapy, according to ABCB1
rs2235013 genotype (CC in black, CT in solid gray, and TT in dashed gray). Plus
("+") symbols signify censored observations.