We also analyzed the expression of CCR8 and its ligand CCL1 using RNA sequencing data from the TCGA cohort as well as using unpublished quantitative real-time PCR data from our previous study [35] comprising 125 samples and show that CCR8, and to lesser extent CCL1, are expressed in human CRC tissue (Figure S10 in Additional file 1). This evidence concerns the gene CCL1 and colorectal carcinoma.