PGR and breast cancer: The AR mRNA levels were significantly increased in women with ER+ BC (SMD: 0.634; 95% CI: 0.488–0.780; p < 0.001) (Supplementary Figure S2A) and in PgR+ BC patients (SMD: 0.576; 95% CI: 0.433–0.718; p < 0.001) (Supplementary Figure S2B).