CCR4 and neoplasm: The local infusion of CAR‐T cells to tumour sites81Modulation of chemokine signalling: overexpressing CCR4,CCR2b or CXCR3 ligands on CSCs‐targeted CAR‐T cells82, 83, 84First using traditional therapies to remove most of the tumour cells, and then applying CAR‐T therapy to target CSCs85