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Increase of T cell activation following sCD40L stimulation. Increase of T cell immune activation defined by the co-expression of CD38 and human leucocyte antigen D-related (HLA-DR) on (a) CD4 and (b) CD8 T cells following in-vitro sCD40L stimulation. Wilcoxon's matched-pairs test was used for statistical analysis; *P < 0·05.
