ELN and idiopathic pulmonary fibrosis: Total collagen (control: 0.37 ± 0.06, IPF: 0.43 ± 0.03; p < 0.001) (Fig. 1d) and collagen 1 (control: 0.19 ± 0.04, IPF: 0.28 ± 0.09; p = 0.014) (Fig. 1e) were both increased in IPF while no change was noted in elastin (control: 0.21 ± 0.03, IPF: 0.16 ± 0.07; p = 0.14) (Fig. 1f) or collagen 3 (control: 0.24 ± 0.05, IPF: 0.23 ± 0.02; p = 0.59) (not shown).