IL6 and endometriosis: Endometriosis is often accompanied by marked changes of inflammatory cytokines, including epithelial cell-derived neutrophil-activating peptide-78 (ENA-78), macrophage migration inhibitory factor (MIF), high-sensitivity C-reactive protein (hs-CRP), tumor necrosis factors (TNF-α), interleukin-1β (IL-1β), IL-6, IL-8, interferon-induced protein 10 (IP-10), and chemokine receptor 1 (CCR1) [99, 100].