Furthermore, significant difference in expression levels was observed in qPCR results for the mild CF group with following genes, IFIT2 (fold change = 3.2, P<0.001), MX1 (fold change = 3.2, P<0.05) and ZFN683 (fold change = -2.1, P<0.05). This evidence concerns the gene MX1 and cystic fibrosis.