In order to investigate the functional role of EBF1 in pericytes, we exposed HBVPs (Supplementary Fig. 2) and PL-PCs (not shown) to different culture conditions, i.e. hypoxia, nutrient starvation and medium obtained from U87 glioblastoma cells cultured under hypoxic and normoxic conditions. This evidence concerns the gene EBF1 and glioblastoma.