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. 2017 Jul 28;1(5):222–236. doi: 10.1002/2017GH000066

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©2017. The Authors.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Plots showing the difference (post‐pre) between EFs measured in the same households, separated by group, for (a) PM_2.5, (b) CO, (c) EC, and (d) OC. Horizontal spread in points is only to separate individual households; line shows median difference for the group.