FGFR2 and glioblastoma: Because RNA-seq data is based on gene expression, but our observations are based on FGFR2 protein levels and because we found differences in RNA and protein expression for FGFR1 and FGFR2 in some of the GBM lines (Fig. 4B and C), we decided to test the correlation between FGFR RNA and protein levels in our samples.