NCF1 and pulmonary mucoepidermoid carcinoma: The human lung mucoepidermoid carcinoma derived cell line NCI-H292 (CRL 1848; American type Culture Collection (ATCC), Manassas, VA) known to express DUOXs was used as positive control for DUOX1/2 testing [38] and lysates from neutrophils isolated from human blood, as usually performed in the laboratory, were used as controls for phagocytic NADPH oxidase compounds: NOX2, p22phox, p47phox, and p67phox [39, 40].