Moreover, a positive correlation between the PD-1+Foxp3+ γδ and PD-1+ γδ T cell proportion was also found in the AML patients (R = 0.704, P < 0.001), while there was no significant correlation in HIs (R= 0.376, P = 0.167) (Figure 4A). The gene discussed is FOXP3; the disease is acute myeloid leukemia.