Correction to: Leukemia (2016) 30, 1184–1187; doi:10.1038/leu.2015.246 Following the publication of this article the authors noted that the labels in Figures 1b and d have been switched. The correct labels in Figure 1b are; mixed lineage leukemia rearranged (MLL rearranged; dotted line) and unknown (thin solid line). In Figure 1d the correct labels are; bone marrow involvement (BM involv; dotted line) and isolated extramedullary (Isolated Ext; thin solid line). The authors wish to apologize for any inconvenience caused. (Figure Presented).