NCR3 and leukemia: Following donor-derived NK cell infusion after haploidentical hematopoietic cell transplantation four times on days 6, 9, 13, and 20, the higher expression level of NKp30 on donor NK cells is an independent predictor of enhanced complete remission and reduced leukemia progression, although early donor NK cell infusion does not impede leukemia progress significantly (52).