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. 2018 Apr 2;17:138. doi: 10.1186/s12936-018-2280-y

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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. 1 — Health area limits and locations of health facilities. Black lines correspond to the limits of the HAs (Thiessen polygons). Each green triangle represents the location of each health facility. The top green rectangle is a zoom of the central urban area (Ouagadougou)