A matched-pair analysis for immune reconstitution kinetics posttransplant. Means (± standard error of the mean) CD3⁺ (A), CD4⁺ (B), CD8⁺ (C), activated T lymphocytes (D), natural killer (NK) cells (E), and CD19⁺ lymphocytes (F) measured at different time points posttransplant. *P < .05; **P < .001.