PDGFC and glioblastoma: Figure 5S shows the correlations between MELK, FZD2, IL1RN, NOVA1, PTPRZ1, TMEM97, and PDGFC and infiltrated immune cells in GBM tissues; of note, there is a significant positive correlation between macrophage and IL1RN and negative correlation between CD8+ naïve T-cells and IL1RN in GBM tissues.