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Changes in levels of cytokines in the sera of MCF-7 tumor-bearing mice following anesthesia. The changes in (A) IL-1, (B) IL-6, (C) IL-8 and (D) TNF-α levels in MCF-7 tumor-bearing mice treated with propofol and ketamine. Data are presented as the mean ± standard deviation of experiments performed in triplicate. *P<0.05 vs. untreated group. IL, interleukin; TNF, tumor necrosis factor.
