(A) NK cell phenotype at weeks 0, 2, and 30 of therapy with VDZ. After exclusion of dead cells, monocytes, B cells, and T cells, cytolytic NK cells were gated as CD56dimCD16high NK cells, cytokine-secreting NK cells were gated as CD56brightCD16low NK cells, and CD56null cells were gated as CD56lowCD16high NK cells. (B to E) Composite graphs representing frequency of cytokine-producing (B), cytolytic (C), and CD56null NK cells (D), as well as CD56+CD8+ NK cells (E) from each of the five subjects (color-coded) at weeks 0, 2, and 30 of therapy with VDZ. (F and G) Change in the expression of HLA-DR (F) and PD-1 (G) on cytolytic CD56dimCD16high NK cells from five subjects (color-coded) at weeks 0, 2, and 30 of therapy with VDZ.