TGFB1 and idiopathic pulmonary fibrosis: Additionally, we also found that (relative to their non-IPF controls) IPF patients’ lung sample gene expression profiles were enriched with genes associated with other fibrotic processes (i.e. MMPs, collagen, and the TGFβ signaling molecules) that we had also shown to be up-regulated in the bleomycin model (Figure S9).