Fujii T., Rehman H., Chung S.Y., Shen J., Newman J., Wu V., Hines A., Azimi-Nekoo E., Fayyaz F., Lee M., Raptis G., Egeblad M., and Zhu X. (2021) Treatment with Granulocyte-colony Stimulating Factor (G-CSF) is not associated with Increased Risk of Brain Metastasis in Patients with De Novo Stage IV Breast Cancer. J Cancer. 12:5687-5692. doi: 10.7150/jca.63159. eCollection 2021.