Interestingly, we could not find an alteration in Foxp3+ CD4+ previously gated on CD4+ CD25+ tumor infiltrating T cells between both mice strains (Supplementary Figure 6A) but an enhanced accumulation of CD4+ PD-1+ T cells in the lung tumors of STAT1 KO mice (Figure 6B). The gene discussed is FOXP3; the disease is neoplasm.