,48 The percentages of hCLCA1-positive epithelial cells (nasal polyps, 93.8% ± 7.2%; nasal mucosa, 85.4% ± 12.3%; sinus mucosa, 71.4% ± 18.7%) were significantly higher in the epithelium of patients with CF compared with that of control subjects (20.8% ± 15.1%; P < 0.05).49 Here, CLCA1 is linked to cystic fibrosis.