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Human endothelial cell (a. HMVEC and c. HUVEC) tube formation in conditioned media harvested from MDA-MB-231 cells treated with immunoliposomes. Number of branches were quantified for (b) HMVEC and (d) HUVEC. All scale bars are 200 μm (* p<0.05, ** p<0.01, *** p<0.001).
