The data analysis was performed using SPSS 18.0 software. The data are presented as the mean ± standard deviation. Descriptive statistics were performed to determine whether the data were normally distributed. Comparisons between groups were performed with one-way analysis of variance (ANOVA), and a post hoc test was used to determine differences between groups. Pearson correlation analysis was performed to assess associations between PD-1, TNF-α, IFN-r, IL-6 and IL-10 expression and the absolute number of T cells.
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