In line with our findings in the metastatic cell line AGP-01, the median expression levels of both mRNA (measured by qPCR) and protein (assessed by Western blot) of FRK and DDR1 were higher in metastatic patient samples regardless of the tumor stage (P < 0.0001 Mann-Whitney U test) (Figure 4B–4C). This evidence concerns the gene FRK and neoplasm.