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Effects of electronic cigarettes (e-cigarettes) on serum free fatty acid (FFA) levels (A) and body weight (B) in apolipoprotein-E knockout mice. All values are means ± SE; n = 5 per group; saline vs. e-cigarette (2.4%), **P < 0.01; e-cigarette (0%) vs. e-cigarette (2.4%), #P < 0.05. Time by group interaction was not significant for the effects of e-cigarettes on body weight.
