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Plasma levels of inflammatory markers are unchanged in sheep exposed to PG e-cig aerosols. Five-day exposure of sheep to e-cig aerosols of PG does not cause a significant change in plasma levels of IL-6 (A), IL-8 (B), or TGF-β1 (C) proteins. n ≥ 6 from ≥ 2 sheep. Data are presented as means ± SE. ns = not significant. Data were analyzed using a mixed-effects model. PG, propylene glycol.
