Kinetics of T-cell reconstitution in the second cohort of patients (n = 40). Graphs show the mean numbers of cells/mm³ of blood plus or minus the standard error of the mean (SEM) for the patients with high TREC values () and the patients with low TREC values (□) in CD3⁺ cells, NK cells, global and naive CD4⁺ and CD8⁺ T-cell subsets before and at 3, 6, 12, and 24 months after transplantation. ^*P < .05 between patients with high TREC levels and those with low TREC levels. Shaded areas indicate values in healthy controls.