CXCL9 and neoplasm: Immature pro-tumor CD56brightCD16low/neg NK cell recruitment occurs via increased expression of CXCL9, CXCL10, CXCL19, CXCL21, and CCL5, and reduced expression of CXCL2, CX3CL1, CXCL1, and CXCL8 (118).