HOXA9 and acute myeloid leukemia: AML with wild-type C/EBPα expression was modelled using a previously characterised myelomonocytic leukaemia cell line, namely, FMH9 (Volpe et al, 2013), which was established by ectopic expression of HoxA9 and Meis1 in bone marrow haematopoietic progenitor cells.