Fig. 2. Percentage of corticotropin-releasing factor (CRF)-positive paraventricular nucleus neurons expressing c-Fos in rats exposed for 60 min to room air or 25, 50, or 70% nitrous oxide (mean ± SD). *P < 0.0005 versus  air, #P < 0.0001 versus  N2O/25%, +P < 0.0001 versus  N2O/50%.

Fig. 2. Percentage of corticotropin-releasing factor (CRF)-positive paraventricular nucleus neurons expressing c-Fos in rats exposed for 60 min to room air or 25, 50, or 70% nitrous oxide (mean ± SD). *P < 0.0005 versus  air, #P < 0.0001 versus  N2O/25%, +P < 0.0001 versus  N2O/50%.

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