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. 2014 Apr 15;2014:163908. doi: 10.1155/2014/163908

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Copyright © 2014 Lu-jing Chen et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Immobile time of rats in forced swim test in the long-term (30 days) after 2-week predator stress. The immobile time (floating without struggling) of stimulated WKY rats was significantly lower than that of the control WKY rats, while Wistar rats showed no changes between predator-stimulated and control groups. Note that control WKY rats showed significantly longer immobile time than control Wistar rats. Each bar indicates a group defined according to strains (Wistar rats and WKY rats) and predator exposure (red bar: Wistar rats; white bar: WKY rats; unshadowed bar: control group; shadowed bar: predator exposure). Values are shown as mean ± SEM. The results of t-test are shown. *P < 0.05 for the effects of predator stress.