PBX1 and acute lymphoblastic leukemia: The subtypes of acute lymphoblastic leukaemia (ALL) which are analysed follow those from the study by Li et al. and include: t(4;11) MLL‐rearrangement, t(9;22) BCR‐ABL, T‐ALL, t(12;21) TEL‐AML1, t(1;19) E2A‐PBX1 and Hyperdiploid > 50 [24].