FLT3 and acute myeloid leukemia: Adults age ≥18 with FLT3-ITD or FLT3-D835-mutated AML. First allo-HSCT with no more than 1 mismatched donor. In CR post-allo-HSCT with adequate blood counts. aGVHD ≤ grade 1, no more than mild/limited cGHVD.