PLOD1 was significantly and strongly correlated with most immune-related genes in specific cancer types, as shown by the positive correlation between chemokine receptors such as CCR1, CCR10, CXCR4 and CXCR1 and chemokines such as CXCL16, CXCL8 and CCL7 and the expression of PLOD1 in a wide range of tumors (Figure 7G,H). Here, CCR1 is linked to cancer.