MET and glioblastoma: Other relevant RTKs include VEGFR, tightly linked with angiogenesis and hypoxia [90]; fibroblast growth factor receptor (FGFR), which plays a role in tumorigenesis and is used to increase proliferation in vitro [91,92]; platelet-derived growth factor receptor(PDGFR); hepatocyte growth factor receptor/mesenchymal-epithelial transition factor (HGFR/c-MET), involved in the development of several types of cancer including GBM [93,94].