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. 2017 Apr 7;17:257. doi: 10.1186/s12913-017-2176-5

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© The Author(s). 2017

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 — Study selection process. A total of 1511 articles were identified as potentially relevant for the study. Based on reading titles and abstracts, 132 articles were considered relevant for further assessment by reading them in full text. Then, based on the inclusion and the exclusion criteria, 20 articles were included in the scoping review