Classifying patients with GBM included in The Cancer Genome Atlas (TCGA) based on combined expression patterns of the two RPPA endpoints discriminating GSf‐ and GSr‐like phenotypes (i.e., SRC and RPS6, respectively), we showed that TCGA GBM patients with GSr‐like features display a significantly shorter overall survival (Marziali et al., 2016). Here, RPS6 is linked to glioblastoma.