WT1 and neoplasm: We subcutaneously inoculated an HLA-A∗24:02+WT1+ PDX tumor and an HLA-A∗24:02+WT1− one, the former expressing WT1 antigen at a moderate level and the latter expressing no WT1 antigen as a specificity control, into the right side and left side, respectively, on the back of a NOG mouse (Figure 4E).