NFKB1 and myalgic encephalomeyelitis/chronic fatigue syndrome: These FM-specific DE expressed genes are involved in telomere structure organization and maintenance (Modules 2 and 5), cellular response to glucocorticoids (Module 7), and regulation of NF-κB signaling (Module 8) (Figure 3C), indicating divergent immune states in ME/CFS and FM with a differential impact in inflammatory processes.