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. 2014 Jun 25;10:140. doi: 10.1186/1746-6148-10-140

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Copyright © 2014 Porphyre et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Connectivity within and between premises types through pig movements as recorded in ScotEID between January 2012 and May 2013. Each premises type is represented by a circle; arrows represent the movement of pigs. The width of the line is proportional to the number of batches moved between premises types. The size of the circles for producers is proportional to the number of producers per producer type.