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Novel multigene signatures for breast cancer survival demonstrate prognostic value by Kaplan-Meier plot and log-rank tests under (A) cross-validation in the training data (GSE1456; N = 159), (B) independent validation set in a second data set (GSE3494; N = 315), and (C) substantial agreement when applied to the replicate data set. Blue solid circles, discordant or inaccurate samples; gold solid circles, complete concordance. Capital letters are patient designations. HR, hazard ratio.
