TP53 and neoplasm: This analysis was limited to the tumours in the GSE61725 cohort, since RNA-seq is unable to detect expression of individual TP53 RNA variants [26] (TCGA cohort) and the Affymetrix U133 A and B microarrays do not have probe-sets in the region unique to Δ133TP53 (GSE3494) [26].