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. 2015 Dec 2;5:17598. doi: 10.1038/srep17598

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Copyright © 2015, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Arrows show the number of individuals moving from one HCD to another. Arrow width is representative of the number of individuals moving. Movements of less than 1000 individuals are not show. The yellow triangle shows the location of the capitol city, Maseru. The figure was produced using the R package ‘diagram’³⁰,³¹.