- To define the relationship between the status of donor NK-cell receptor and patient outcomes after killer immunoglobulin-like receptor-incompatible unrelated donor (URD) and umbilical cord blood (UCB) hematopoietic cell transplantation (HCT) in young patients with acute myeloid leukemia with monosomy 7, -5/5q-, high FLT3 internal tandem duplication allelic ratio (High-FLT3-ITD AR), or refractory or relapsed acute myelogenous leukemia.