Transplantation from NK-alloreactive donors with B-haplotype telomeric KIR genes reduced NRM and improved EFS. (A) Probability of EFS; (B) cumulative incidence of leukemia relapse; and (C) cumulative incidence of NRM. Tel-B/x, 26 patients transplanted from NK-alloreactive donors with B-haplotype telomeric KIR genes; Tel-A/A, 43 patients transplanted from donors with A-haplotype telomeric KIR genes.