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Expression of CD4+CD25+ T cells in the flow cytometric analysis. The patients with lumbar disc herniation (patients) had statistically lower levels of CD4+CD25+ T cells than did normal controls (control), when expressed either as percentages of cells from disc tissue (mean ± SD, 0.07 ± 0.09% versus 1.72 ± 0.48%, p < 0.05) or peripheral blood mononuclear cells (PBMC) (resting state 1.15 ± 1.02% versus 4.80 ± 1.82%, p < 0.05, stimulated state 7.51 ± 1.01% versus 17.03 ± 3.17%, p < 0.05).
