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. 2017 Jan 10;7:663. doi: 10.3389/fphys.2016.00663

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Copyright © 2017 Palazzolo, Crow, Nelson and Johnson.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Concentrations of CO collected from 3 puffs of air, ECIG-generated aerosol, and smoke. Data points given as mean ± standard error of the mean. a = p < 0.001.