GSTM1 and glioblastoma: In this report, we selected samples from short-survival (survival < 0.5 years) and long-survival (survival > 2 years) patients followed by ATAC-seq and RNA-seq analyses and identified GSTM1 as a prognostic marker of GBM, which was confirmed in a different cohort and through TCGA analysis (Additional file 1: Fig. S4a).