As reported, AML1‐ETO can efficiently induce mice leukaemia in cooperation with WT1 gene (Wilm's tumour‐1).5 To construct AML1‐ETO‐expressing mice leukaemia model, Lin− cells were isolated and transduced with AML1‐ETO plus WT1 and xenografted in recipient mice (Figure S3A). The gene discussed is RUNX1; the disease is leukemia.