PGR and breast cancer: Moreover, stratified Kaplan–Meier analysis showed that increased expression of FST was good predictors for survival in pathological stage I–II (Additional file 3: Fig. S1a, log-rank p < 0.05), distant metastasis free (Additional file 3: Fig. S1b, log-rank p < 0.01), lymph node free (Additional file 3: Fig. S1c, d, log-rank p < 0.05), and PR-positive subgroups of patients with BC (Additional file 3: Fig. S1e, f, log-rank p < 0.05).