Kaplan-Meier survival curves in cohorts. Kaplan-Meier survival curves for the two prognostic groups derived from pam-clustering (k = 2)  on the molecular prognostic index distribution in the three training cohorts (a) NKI2, (b) EMC and (c) NCH, and three external cohorts (d) JRH-1, (e) UPP and (f) JRH-2. We also give the hazard ratio (HR), the associated 95%CI and the number of events (death or distant metastasis) and number of distinct data points in each prognostic group.
Teschendorff et al. Genome Biology 2006 7:R101 doi:10.1186/gb-2006-7-10-r101