Because there were differences in tumor volumes at initial time points between shE2F3; GFP and shE2F3; GFP-Nek2 and none between shE2F3 and shE2F3; GFP-Nek2 (Figure 1), the immunofluorescence results comparing shE2F3 and shE2F3; GFP-Nek2 presented here have to be interpreted conservatively, since we did not perform such analysis comparing shE2F3; GFP and shE2F3; GFP-Nek2. This evidence concerns the gene NEK2 and neoplasm.