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. 2017 May 19;12:67. doi: 10.1186/s13012-017-0597-5

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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. 5 — Total number of quotes related to sustainability [37]. Themes for “Spread and Scale” were stratified into “Sustainability” categories noted in inclusion. Quotes are separated into barriers and enablers