Pixel intensity correlation analyses confirmed a strong correlation between CSRP2 and HIF-1α expression in all tumour sections analysed, with Pearson coefficient values ranging from 0.50 to 0.85 for MCF-7 cell-derived tumours, and from 0.63 to 0.86 for MDA-MB-231 cell-derived tumours (n = 22 and 21, respectively; Fig. S5). This evidence concerns the gene HIF1A and neoplasm.