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. 2015 Dec 15;5:18259. doi: 10.1038/srep18259

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Control rats (C) had longer lifespans than rats in the runner groups (R) of the same strain (HCR-C vs. HCR-R, P < 0.05 and LCR-C vs. LCR-R, P < 0.01). Mean lifespans were also significantly different between rat strains (HCR-C vs. LCR-C, P < 0.05). Values in the table show means±SDs.