CXCL8 and chronic rhinosinusitis without nasal polyps: Clarithromycin and dexamethasone could also similarly decrease the protein production of CXCL8/IL-8 (Fig. 6a) from CRSsNP and non-eosinophilic CRSwNP and CXCL10/interferon-γ-induced protein 10 (IP-10) (Fig. 6b) and CCL11/eotaxin (Fig. 6c) from eosinophilic and non-eosinophilic CRSwNP, and the mRNA expression of CCL20/macrophage inflammatory protein-3α (MIP-3α) (Fig. 6f) in CRSsNP and eosinophilic CRSwNP.