GATA2 and acute myeloid leukemia: Preliminary results from two gata2b mutant zebrafish models highlight how zebrafish can elucidate the link between GATA2 deficiencies and MDS/AML predisposition as gata2b+/– mutants have reduced myeloid differentiation and dysplastic myeloid cells in older animals (Avagyan et al., 2017; Gioacchino et al., 2019).