FOXP4 and idiopathic pulmonary fibrosis: Expression of ALCAM (mean fold change 0.58, 95% CI 0.40 – 0.85, P =0.03) and FOXP4 (mean fold change 0.70, 95% CI 0.50 – 0.98, P = 0.046) were decreased in IPF lung compared to controls (Fig. 2).