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. 2014 Dec 30;21(1):105. doi: 10.1186/s12929-014-0105-z

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© Rua et al.; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Lumen area analysis. Bar graphs showing percentage of cross-sectional luminal areas of arteries (white bars) and veins (black bars) from the umbilical cord of the non-smokers group (n = 10) and the smokers group (n = 12). The values are presented as means ± SEM.