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. 2018 Jul 18;18:894. doi: 10.1186/s12889-018-5746-5

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 3 — Examples of ventilation bricks commonly found in the study area in central Côte d’Ivoire. These are often either left unscreened, or blocked (e.g. with LLINs, as shown in the top left image)