Proliferation of T lymphocytes and NK cells. Total percentage of proliferating S-phase T lymphocytes and NK cells in PB samples from heathy individuals aged >60 years (n = 10) and high-risk patients with SMM (n = 31) studied at baseline and after 3 and 9 cycles of induction therapy with LenDex. Each area represents the specific fluctuation of S-phase CD4 (light gray) and CD8 T lymphocytes (gray) and NK cells (dark gray).