FGF10 and fibrosis: To induce fibrosis or lung injury, mouse precision-cut lung slices (PCLS) were incubated 24 h with a fibrosis cocktail or elastase, respectively, and then treated with 250 ng/ml of wildtype FGF10 or FGF10-STAB2 (Fig. 7A, E) for 24–72 h for accessing metabolic activity/imaging or cytotoxicity, respectively.