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. 2016 Oct 22;17:64. doi: 10.1186/s12910-016-0146-9

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© The Author(s). 2016

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. 2 — Distribution of active clinical trials in SSA involving HBS collection (Trial information Source: WHO-ICTRP as of January 1, 2015; Map source: Wikimedia Commons)