TNF and necrotizing enterocolitis: In the serum, the NEC group showed a significant increase from the control group in IL-6 and TNF-α(p = 0.0026 and p = 0.0338) and the medium dose MSC cell group showed a significant decrease from the NEC group in IL-6 and IL-17A (p = 0.0286 and p = 0.0271).