. 2011 Sep 13;6(9):e24010. doi: 10.1371/journal.pone.0024010
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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.
Figure 1. The location of sampled areas for avian influenza virus in northwestern Minnesota, USA, 2007 and 2008.
