Increased HUVEC migration regulated by GATA1-mediated enhancement of VEGF expression is not due to increased HUVEC proliferation because there was no significant difference in HUVEC proliferation within 24 h of culture between the conditioned media from GATA1-overexpressing cancer cells and control cells (Figure 2B and Supplementary Figure S2C, S2D). The gene discussed is GATA1; the disease is cancer.