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Effects of the absence of IL-1β/IL-18, Casp-1, and Fpr-1 on apoptosis. TUNEL staining of tracheal transplantation: WT (A), IL-1β/IL-18 KO (B), Casp-1 KO (C), Fpr-1 KO (D), graphical quantification (E). For TUNEL staining, n = 5 animals from each group were employed. A 20× magnification is shown (50-µm scale bar). A p-value less than 0.05 was considered significant. ### p < 0.001 versus the WT group.
