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. 2017 Jun 29;12(6):e0179915. doi: 10.1371/journal.pone.0179915

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© 2017 Schulz et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 4 — (a) Network loyalty (fraction of common directed links contained in two consecutive snapshots) of the pig movement network in Denmark between 1^st January 2006 and 31^st December 2015. Asymmetry is caused by varying number of directed links per year. (b) Development of the fraction of common directed links per year time difference. Dark grey areas represent the interval between 1^st and 3^rd quantile, light grey areas represent the interval between minimum and maximum values for the fraction of common directed links.