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Box-and-whisker plots showing the amount of 1-methylhistamine in mouse urine (n = 5), as measured by ELISA. 1-methylhistamine levels were normalized with creatinine (mg/g creatinine). Vertical bars extend from the minimum to the maximum value; box, 25 and 75 percentiles; horizontal bar, median. *P < 0.05, compared with sham-irradiated samples.
