Fig. 1From: A phase II clinical trial of adoptive transfer of haploidentical natural killer cells for consolidation therapy of pediatric acute myeloid leukemiaAverage natural killer (NK) cell engraftment (a) in peripheral blood plotted over time. KIR–HLA-mismatched NK cells expanded over time in 17 patients (b) and contracted in 4 patients (c). Donor NK cell chimerism was detected in 18 patients (d, gray line), of which 4 were noted to have rising levels over time (black line)Back to article page