SMN1 and pemphigus foliaceus: Supplementation with sDel-1 at 5, 9, and 13 dpa reduced pulmonary collagen deposition in both WT and Del-1−/− mice with BLM-induced PF, as revealed by ex vivo micro-computed tomography (μ-CT) (Figure 5A) and a biochemical assay to detect expression of α-smooth muscle actin (SMA), an indicator of myofibroblasts (Figure S9A).