There were no significant differences in the levels of IL-1rα, IL-2, IL-6, IL-7, IL-8, IL-9, IL-12p70, IL-13, IL-15, IL-17, basic FGF, eotaxin, G-CSF, GM-CSF, IFN-γ, IP-10, MCP-1, RANTES, TNF-α, and PDGF-BB between the CFS/ME group and the control group (data not shown). Here, IL15 is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.