PROM1 and neoplasm: The recruitment of F4/80+ cells was either unchanged in U87MG tumors or slightly increased in the LN229 tumor, but the increase in recruitment of Ly6G+ cells was significantly correlated with accumulation of Nestin+ and CD133+ cells observed in the co-injection tumor models of U87MG and LN229 cells (Supplementary Fig. 8b, c).