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The concentrations of nitrite, nitrate, total nitric oxide, and nitrite/nitrate in testicular homogenates of mice exposed to normal air (AE) or water pipe smoking (WPS) (30 min/day) with or without treatment with nootkatone (NK) (90 mg/kg/day). Each vertical column with a bar represents the mean ± SEM (from 7 mice in each group). P less than 0.05 was considered significant.
