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. 2018 Aug 6;18:977. doi: 10.1186/s12889-018-5914-7

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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 — Logical framework of the study. This LFW includes subsequent expected outcomes according to the specific objectives and it was used to facilitate the intervention process towards the intended objectives of the study. Interventional activities were delivered in the sequence of the LFW