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Effects of ketamine on nitric oxide production in pulmonary tissues from ovalbumin-sensitized and -challenged rats. Nitric oxide production was determined by measurement of nitrite, and the results are expressed as μmol/g protein. Bars represent mean ± SEM (n = 6–8/group). # P < 0.05 vs. PBS control; * P < 0.05 vs. OVA control. The groups are as shown in Figure 1.
