CXCL8 and obstructive sleep apnea syndrome: As shown in Table 2, 12-cytokines including IL-5, INF-α, IL-2, IL-2, IN-6, IL-1β, IL-10, IL-γ, IL-8, IL-17, IL-4, and IL-12P70, and TNF-α were measured to assess the level of inflammatory responses in OSA and MetS.