COL14A1 and idiopathic pulmonary fibrosis: When focusing on specific regions, we also observed a lower percentage of positively-stained area in lung parenchyma of patients with IPF compared to both non-IPF control groups (Fig. 3B), Lastly, the analysis of airways revealed a lower percentage of positive-stained area of COL14A1 in both airway wall (Fig. 3C) and bronchial epithelium (Fig. 3D) of IPF-derived lung tissue compared to non-IPF controls (both groups).