In addition, IL17A, which was an important predictor in our feature selection-driven logistic regression model, was richly interconnected with other cytokines in the C-ME/CFS CSF immune network, whereas in the A-ME/CFS group, IL17A was only correlated with TNFβ and sFasL. Here, FASLG is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.