Our immunohistochemical analysis by using anti-IL13Rα2 antibody (KH7B9), detected IL13Rα2 in the xenograft tumour cells derived from A375, but not in IL13Rα2-negative cells (A375-IL13RA2 KO and A2058 cells) (Fig. S2A–C), thus confirming the specificity of the KH7B9. This evidence concerns the gene IL13RA2 and neoplasm.