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. 2013 Aug 13;16(2):145–154. doi: 10.1093/ntr/ntt127

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© The Author 2013. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/3.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.

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Figure 2. — Scatter plot showing correlation between blood and salivary cotinine in 628 pregnant smokers with linear regression line without taking into account of a priori factor, as well as regression lines at high and low body mass index (BMI).