“Incidence of Central Nervous System Metastases in Patients With Human Epidermal Growth Factor Receptor 2-Positive Metastatic Breast Cancer Treated With Trastuzumab: A Meta-Analysis”. Clinics 76 (August 16, 2021): e2653. Accessed June 16, 2024. https://www.journals.usp.br/clinics/article/view/213024.