ERBB2 and breast cancer: The 3-year EFS of the patients with pCR and non-pCR were 94.74% (95% CI = 85.21% to 100.00%) and 57.39% (95% CI =43.81% to 75.19%), respectively, in the HR-low/HER2-negative BC group, and 89.70% (95% CI = 82.20% to 97.90%) and 69.73% (95% CI = 62.51% to 77.77%), respectively, in the TNBC group.