TP53 and glioblastoma: The P‐values of the dysregulated pathway are 1.1×10−6 in the cell cycle pathway, 8.8×10−6 in glioblastoma, 1.6×10−5 in melanoma, 2.5×10−4 in the p53 signalling pathway, 7.5×10−4 in the feedback loop pathway and 3.4×10−3 in the cancer pathway according to the DAVID functional annotation tool.