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. 2010 Feb 25;5(2):e9385. doi: 10.1371/journal.pone.0009385

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van Cleef 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 properly credited.

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Pig-density is depicted in panel A, population-density is depicted in panel B. The participating municipals of St. Anthonis, Venray and Meijel are indicated with “•”. Source: CBS Statistics Netherlands (www.cbs.nl).