Ovcaricek, Tanja, Iztok Takač, and Erika Matos. “Multigene Expression Signatures in Early Hormone Receptor Positive HER 2 Negative Breast Cancer”. Radiology and Oncology 53, no. 3 (September 20, 2019): 285-292. Accessed January 21, 2020. https://www.radioloncol.com/index.php/ro/article/view/3240.