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. 2019 Mar 28;19:195. doi: 10.1186/s12913-019-3960-1

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© The Author(s). 2019

Open Access This 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 — Population Intervention Programme Surveillance Area, (PIPSA), (used with permission) Africa Health Research Institute. Map of the Population Intervention Population Surveillance Area (PIPSA), boundaries in which the Africa Health Research Institute operates (in grey); the rest of Hlabisa sub-district (in light grey). The distribution of the clinics in which the study was conducted are shown in crosses, and Africa Health Research Institute in a triangle