Using The Cancer Genome Atlas (TCGA) Kidney Clear Cell Carcinoma (KIRC) database from the Genomic Data Commons (GDC), we performed the same analysis with a significantly larger group of patients (N = 985), and we evaluated the correlations of the gene expression level of CTNNB1, which encodes β-catenin, with the gene expression levels of the transcription factors SNAI1, SNAI2 and ZEB1 (Supplementary Fig. S6B). This evidence concerns the gene SNAI1 and clear cell renal carcinoma.