BC	Breast cancer
CTC	Circulating tumor cell
CK	Cytokeratin
EMT	Epithelial–mesenchymal transition
ER	Estrogen receptor
FDA	Food and drug administration
FISH	Fluorescence in situ hybridization
HER2	Human epidermal growth factor receptor 2
HR	Hormone receptor
NR	Nuclear receptor
OS	Overall survival
PBC	Peripheral blood cell
PBMC	Peripheral blood mononuclear cell
PFS	Progression free survival
PR	Progesterone receptor
RAR	Retinoic acid receptor
RXR	Retinoid X receptor
THR	Thyroid hormone receptor
VDRE	Vitamin D response element
VDR	Vitamin D receptor
WBC	White blood cell