RARA and acute myeloid leukemia: • AML with t(8;21)(q22;q22)/AML1(CBFA)-ETO• AML with marrow abnormal eosinophilia-inv(16)(p13;q22)-t(16;16)(p13;q22)/CBFB-MYH11• APL M3(FAB) with t(15;17)(q22;q12)/PML- -RARA and variants