Progression-free survival	PFS
Overall survival	OS
Colorectal carcinoma	CRC
Circulating tumor cells	CTCs
Epithelial cell adhesion molecule	EpCAM
Collagen adhesion matrix	CAM
Epithelial markers	Epi+
Hazard ratio	HR
Confidence interval	CI
Akaike information criterion	AIC
Invasive CTCs	iCTCs
Carcinoembryonic antigen	CEA