Figure 2.

Breast cancer molecular subgroups show distinctly different disease outcome. Kaplan–Meier curves shown in this figure represent disease-free survival with metastatic relapse as an end point. (a, b) show survival curves in the CIT and validation set, respectively. Abrupt breaks in some curves of (a) are related to small numbers of patients with long-term follow-up in these subgroups. These appear smoothed out in (b) because of greater numbers in the validation set.