Even at a decreased dose of lymphocytes (10 million cells/mouse) the IL-2, IL-21, IL-2/21, IL-7/15 and IL-7/15/21 groups were significantly better at slowing or decreasing tumor growth than the control or the cyclophosphamide-alone groups (Figure 5b; all p < 0.0001). This evidence concerns the gene IL7 and neoplasm.