SF3B1 and glioblastoma: Remarkably, a higher SF3B1 expression was found in human mesenchymal and classical GBM (both GBM -subtypes with poorer -survival) compared to control samples and/or to proneural GBM (GBM subtype with better- survival) in both Rembrandt (Fig. 4d) and CGGA (Fig. 4e) cohorts.