PGR and breast cancer: No statistically significant associations were found between miR-210-3p and outcomes in univariable analyses as well as in a multivariable model including clinical biomarkers indicated in the 8th edition of the American Joint CC Breast Cancer prognostic classification23, which includes Pathological Stage (T = Tumour dimension, N = Lymph node status), Grade, HER2, ER and PgR status (Supplemental Table S5).