KIT and leukemia: In regards to recently published data on the prognostic impact of clonal interference in CBF leukemia [34], parallel evolution of more than one mutation in the signaling genes KIT, RAS, FLT3, JAK1/2, CBL, or PTPN11 in a single patient (assuming that these mutations arise in independent subclones) did not affect overall or RFS in our CBF leukemia cohort (Supplementary Figs. S5 and S6).