Figure 1 .

Effects of fludarabine on peripheral blood lymphocyte population. Mean (SEM) of the following at baseline, two months, and four months were plotted: numbers of (A) CD4⁺ T cells and (B) CD8⁺ T cells; (C) the ratio of CD4⁺ CD45RO⁺/CD4⁺ CD45RA⁺ cells; numbers of (D) CD25 expressing CD3⁺ cells and (E) CD20⁺ cells. Data were obtained for both the fludarabine and placebo groups.