CXCL13 and breast cancer: Interestingly, nine chemokines (CCL2, CCL3, CCL4, CCL8, CCL19, CXCL9, CXCL10, CXCL11, and CXCL13, marked by #) of 19 shown in Table 2 contribute to the 12‐chemokine signature described previously in BC and melanoma progression (Messina et al., 2012; Prabhakaran et al., 2017).