Impact of Ki67 expression on CD4 and CD8 TREC contents. (A) Comparative analysis between the percentage of Ki67⁺ CD4 and CD8 T cells in HIV-negative subjects (□) and in 42 randomly selected HIV-1-infected subjects () at early and intermediate stages of disease. (B) Correlation between the percentage of Ki67⁺ CD4 (○) and CD8 (•) T cells and TREC contents within the 2 T-cell populations. Asterisks indicate statistical significance (P < .05). Data are expressed as mean ± SE.