As shown in Figure 1(G), incubation with Epo + LFM-A13 significantly reduced number of cancer cells in both MCF-7 and MDA-MB-231 xenografts as reflected by the drop in fluorescence intensity (87.27 ± 7.32 vs. 56.25 ± 9.76 and 92.15 ± 8.74 vs. 48.34 ± 9.35, respectively; *p < .05). Here, EPO is linked to cancer.