ERBB2 and breast cancer: Furthermore, the scatter plots of the data clearly indicated that PARP1 positively correlated with p-YB-1 in the BC (n = 90, r = 0.6234, p < 0.0001***), HR + /HER2- (n = 52, r = 0.3556, p = 0.0097**) and HR-/HER2- (n = 13, r = 0.7673, p = 0.0022**) groups of patients (Fig. 7H–J).