Finally, the K-M survival curves of COL1A2 in four independent GBM cohorts (Rembrandt, GSE16011, TCGA, and CGGA cohorts) showed that the prognosis outcomes of GBM patients in the high expression group were significantly shorter than that of GBM patients in the low expression group (Figure 7G). Here, COL1A2 is linked to glioblastoma.