CCL2 and myalgic encephalomeyelitis/chronic fatigue syndrome: We found other significant correlations between cytokines and the clinical data in ME/CFS subjects that were not found in controls: CCL2, CXCL10, and CCL11 were positively correlated with age (r = 0.440, q = 0.060 for CCL2; r = 0.394, q = 0.099 for CXCL10; r = 0.431, q = 0.060 for CCL2) (Fig. 6d).