Kaplan-Meier survival plots for the five breast cancer data sets. Samples in each data set were split into two groups using the median values as the cutoff values. Green, samples having higher module 2 expression; red, samples having lower module 2 expression. Note that the time durations for GSE4922 are for disease free survival times. (a) Results before rescaling module 2 expression values across five breast cancer data sets. (b) Results after rescaling.