CXCL12 and chronic rhinosinusitis with nasal polyps: In addition to eotaxin-1/-2/-3, various chemokines, such as CC motif chemokine ligand 5 (CCL5 or RANTES), CXC motif chemokine ligand 8 (CXCL8 or IL-8), CCL23, CCL18, CXCL12 (stromal cell-derived factor 1 α, SDF-1 α), and CXCL13 (B cell-attracting chemokine 1, BCA-1), have been linked to the selective recruitment of inflammatory cells in the mucosa in CRSwNP.