FOXP3 and neoplasm: For instance, when CD4+FOXP3+ T cells were used as the RC, the MIN distance of tumor cells was 11.12 μm of P2433 and 28.83 μm of P7422; the MIN distance, of CD8+ T cells, was 19.60 μm of P2433 and 8.6 μm of P7422 (Figure 2b).