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. 2019 Apr 28;13(1):94–105. doi: 10.1080/19336896.2019.1607462

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This work was authored as part of the Contributor’s official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.

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 cited.

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Figure 1. — Three-dimensional PCA scatterplot of CWD-positive, -negative exposed, and -negative deer. All known negative animals from Herd 1 (NN1; green dots) and one from Herd 2 (NN2, black dot) are located in a cluster (green) closely associated with all other NN2 individuals (black cluster). Three Herd 3 CWD-positive (PP3, red dots) and one -negative exposed individual (NE3, blue dot) are not associated with clusters in the plot and represent outliers. Remaining PP3 and NE3 animals and Herd 4 (PP4, pink dots; NE4, aqua dots) animals form closely associated clusters, with the exception of four NE3 animals found within or in close association to the PP3 cluster.