TNF and peritonitis: Further, both in the sham and peritonitis groups, there were no significant differences in the serum TNF-α levels between the irradiated and non-irradiated groups (peritonitis group; irradiated: 73.3 pg/mL [58.9–146.3], non-irradiated: 103.0 pg/mL [69.7–194.8], p = 0.436; sham group; irradiated: 17.9 pg/mL [5.5–31.1], non-irradiated: 31.1 pg/mL [21.2–31.1], p = 0.310) (Fig 5D).