231.Br	MDA-MB-231.BR
231.Br.HER2	MB-231.BR.HER2 overexpressing cells
ALDH	Aldehyde dehydrogenase
BCSC	Breast cancer stem cells
BMFS	Brain metastases-free survival
BR-BCSC	Brain breast cancer stem cell signature
CAM	Chicken embryo chorioallantoic membrane model
CNS	Central nervous system
CSC	Cancer stem cells
DFS	Disease free survival
HER 2	Human epidermal growth factor receptor 2
MFE	Mammosphere forming efficiency
OS	Overall patient survival
REMARK	REporting recommendations for tumor MARKer prognostic studies
TNBC	Triple-negative breast cancer