Our results clearly indicated a strong positive correlation and co-localization between RP215high cells and CD44v6+ cells in the basal-like or invasive cancer cells (correlation coefficient R = 0.6794, P = 4.53 × 10−9, n = 58), but no correlation or co-localization was found between IgGhigh cells and CD24+ cells (Supplementary Figure S2A). This evidence concerns the gene CD24 and cancer.