PPP1R13B and glioblastoma: Analysis of unpaired samples from 33 cancer and normal tissues revealed that ASPP1 expression was significantly reduced in most cancer types, including COAD, GBM, BLCA, BRCA, LUSC, PAAD, READ, KIRC, LGG, LIHC, LUAD, TGCT, THCA, SKCM, STAD and UCS.