Figure 4A shows overlap in the expression of dysregulated transcripts of pulmonary fibrosis. In particular, Venn analysis showed 257 and 183 gene transcripts that were similarly up- or down-regulated between IPF and TGFα mice on Dox for 3 weeks. When we performed an enrichment analysis using this overlapping gene sets, we found an enrichment for apoptosis-linked genes (Figure 4B). Here, TGFA is linked to pulmonary fibrosis.