COL4A1 and glioma: The univariate Cox analysis was also applied to identify 11 prognostic TRP‐related genes specific to gliomas, including TIMP1, SERPINE1, NNMT, IGFBP2, EMP3, COL4A2, COL4A1, COL3A1, COL1A2, ANXA1, and CHI3L1 (Figure 6B).