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Effect of analgesic agents on myeloperoxidase (MPO) activity in the jejunum (A) and ileum (B) 72 hr after either saline or 5-FU injection. Data are expressed as mean (MPO units/g tissue) ± SEM. * indicates p < 0.05 compared to saline + no analgesic and † p < 0.05 compared to 5-FU + no analgesic.
