VAN DER LAAT, A.; RAMOS-ESQUIVEL, A.; LANDAVERDE, D. U. Neoadjuvant Metformin Added to Systemic Therapy Increases Pathological Complete Response in Breast Cancer: A Cross-sectional Study, Mexico Hospital, Costa Rica. Archives of Breast Cancer, v. 5, n. 1, p. 32-37, 29 Mar. 2018.