In the subgroup of newly diagnosed glioblastomas, TGF-β1 was expressed at higher levels than TGF-β2 (p=0.04) or TGF-β3 (p<0.001), whereas expression levels between TGF-β2 and TGF-β3 did not differ (Figure 1B). Here, TGFB1 is linked to glioblastoma.