PDX1 and idiopathic pulmonary fibrosis: Results indicate that 19 and 10 proteins for IPF-1 and IPF-2, respectively, are up-regulated (≥1.5 and p < 0.05), as well as 10 and 2 proteins, for IPF-1 and IPF-2, respectively, are down-regulated (≤−1.5 and p < 0.05) compared to the NL-1 proteome (Tables S4 and S5).