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The proportions (expressed as percentages of CD4+ cells) and absolute numbers of CD4/CD28 and CD4/CD26 subsets in lymphoid tissue (LT) and peripheral blood (PB) of HIV+ patients before (t = 0) and after (t = 24 weeks) treatment with HAART alone or HAART + IL-2
* P < 0·05 compared with t = 0; ** P < 0·05 compared with t = 0 of HIV+ patients.
