CXCR4 and colorectal carcinoma: Besides, the expression of CXCL3, CXCL8 (152, 153), CCL5, CCL11 (121), CCL18 (154), CCR2 (155) (the receptor of CCL7), and CXCR4/7+CXCL12 (156) is closely correlated with the overall survival of CRC patients.