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. 2016 Jul 11;20(4):346–350. doi: 10.1093/ijnp/pyw063

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© The Author 2016. Published by Oxford University Press on behalf of CINP.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Ratio of stimulant to sedative effects of nitrous oxide (N₂O) inhalation in participants without (FH^-) and with (FH⁺) a family history of alcohol problems at baseline and during N₂O inhalation. Bars represent (untransformed) estimated marginal means and associated standard errors of the means.