To visualize the prognostic value of CCAT2 in Kaplan-Meier curves, we divided CCAT2 expression into 4 parts (negative, low, intermediate, and high, as based on the quartile levels of all 997 tumors) (Supplementary Fig. 3) for the 134 LNP primary BC patients that received systemic adjuvant CMF. Here, CCAT2 is linked to breast cancer.