CXCL8 and chronic rhinosinusitis with nasal polyps: When we divided patients with CRSwNP into groups of CRSwNP with and without aspirin intolerance, both groups presented lower levels of IL-8 when compared to the control group (CRSwNP with aspirin intolerance p=0.001 and CRSwNP without aspirin intolerance p<0.001).