Breast cancer patients n=173 Age (years; mean [range]) 55.0 (34–81) HER2 0/1+2+/3+ 66/89/18 DCIS/IDC/ILC/Other 58/107/5/3 LN metastasis +/- 125/48 Healthy controls n=22 Ages (years; mean[range]) 30.9 (21–42)

Table 1: Demographic and clinical characteristics of the patients and healthy donors.