CCR4 and neoplasm: CCR4, CCR8, CCR10, and CXCR3 induce Treg cell migration to the tumor microenvironment in response to CC and CXC chemokines: CCR4 is bound by CCL17 and CCL22, CCR8 is bound by CCL1, CCR10 is bound by CCL28,and CXCR3 is activated by CXCL9/10/11 [77].