CA9 and glioblastoma: TAGLN expression positively correlated with hypoxia‐related genes (HIF1A, CA9, LDHA, PDK1, PGK1, VEGFA, and EPAS1) in the TCGA GBM/LGG (IDH‐WT) and CGGA GBM (IDH‐WT) datasets (Figure S2A,B, Supporting Information).