Second, while previous studies have observed only minimal expression differences between IPF and SSc fibroblasts, our study successfully identified 68 genes that were differentially expressed between them, including inflammation genes (TNFRSF21, CXCL5, IL8) and genes associated with the GO function “oxidoreductase activity” (Figure S2). This evidence concerns the gene TNFRSF21 and idiopathic pulmonary fibrosis.