FoxP3 expression and CD4+CD25+T cells in CFS/ME. The percentage of CD4+T cells expressing CD4+CD25+FoxP3+ markers are represented in the bar graph. Tregs of interest in this study were those positive for FoxP3 and CD4+CD25+ in CFS/ME (black bars) and control (white bars) participants. *Represent statistically significant results at p < 0.05. Data presented as mean ± SEM.