The expression of ETS1 in distinct anatomical locations of 34 GBM samples was analyzed by using Ivy GAP database (http://glioblastoma.alleninstitute.org/) (38), which documented transcriptome from microdissected human GBM anatomic regions, including leading edge, infiltrating tumor region, cellular tumor core region, microvascular proliferation region and pseudopalisading necrosis region. Here, ETS1 is linked to glioblastoma.