Fig. 2.
Association between the 4-gene signature and overall survival of GBM patients. (a) The distribution of risk scores ordered from low to high. (b) Heatmap showing the expression of the four prognostic genes. The expression change from left to right corresponds to the risk score from left to right. (c) Survival curves using Kaplan-Meier analysis of overall survival when patients are divided into two risk groups based on median of the risk scores