Fig. 4From: Overexpression of endothelin B receptor in glioblastoma: a prognostic marker and therapeutic target?Protein expression of ETBR in GBM by immunohistochemistry staining. Representative photomicrographs showing high or low grade of ETBR staining (brown). Normal aging brains (frontal part) served as controls. Right panel is a higher magnification of the left panelBack to article page