ACTA1 and cholangiocarcinoma: An enhanced green fluorescent protein (EGFP)-expressing human male CCA cell line (EGI-1) displaying an EMT phenotype was xenografted by intraportal injection into a severe combined immune deficiency (SCID) male mouse, and dual immunofluorescence for EGFP (CCA cell marker) and α-SMA (CAF marker) was performed on liver tumors.