The expression of COL3A1 and CDH3 was higher in the lung tissues of patients with IPF than in those of healthy individuals (p < 0.05; Figures 4A,B), whereas the expression of CEBPD and GPIHBP1 was remarkably lower in the lung tissues of patients with IPF than in those of healthy individuals (p < 0.05) (Figures 4C,D). This evidence concerns the gene COL3A1 and idiopathic pulmonary fibrosis.