PGR and triple-negative breast carcinoma: , IQR; interquartile range, ER; estrogen receptor, PgR; progesterone receptors, HER2; human epidermal growth factor receptor 2, TNBC; triple-negative breast cancer, NCT; neoadjuvant chemotherapy, AC; anthracycline, T; taxane, SLNB; sentinel lymph node biopsy, ALND; axillary lymph node dissection, *; Fisher’s exact test, Bold text; variables to match