Rangel, N., A. F. Aristizábal, and M. Rondón. “Androgen Receptor Expression Relative to Estrogen Receptor Expresion (AR/ ER) and Relationship With a Gene Proliferation Signature in ER-Positive Breast Cancer”. Revista Colombiana De Endocrinología, Diabetes &Amp; Metabolismo, vol. 6, no. 3, Oct. 2019, pp. 164-9, doi:10.53853/encr.6.3.530.