Kinetics of engraftment after HCT with nonmyeloablative conditioning. (A) Median percentages of donor chimerism levels among peripheral blood cell subsets in patients with sustained engraftment (n = 108). (B) Evolution of T cells/μL of host and donor origin in patients with sustained engraftment. (C) Evolution of absolute (donor + recipient) CD4⁺ T-cell, CD8⁺ T-cell, and NK-cell counts/μL.