CXCL8 and obstructive sleep apnea syndrome: Remarkably, OSA status is associated with a range of variables, showing positive correlations with IL-6 and CRP concentrations in serum, TNF-alpha concentrations in serum, IL-8 concentrations in plasma, CRP concentrations in plasma, S100B concentrations in plasma, and TNF-alpha concentrations in plasma, as well as sex, BMI, and AHI.