TLR7 and chronic rhinosinusitis without nasal polyps: Mucosal scraping from MM was studied for presence of viruses and sinonasal epithelial cells harvested from ethmoid sinus tissue in CRSwNP, CRSsNP and controls was investigated for the expression of Toll-like receptor (TLR) 3, TLR7, and IFN and IFN stimulated genes (ISGs)