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. 2014 Feb 7;9(2):e87381. doi: 10.1371/journal.pone.0087381

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© 2014 Wang 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.

PMC Copyright notice

The image was generated by the software ArcGIS (ESRI, Redlands, CA, USA). Green dots represent genetic cluster C1, yellow dots represent genetic cluster C2, red dots represent genetic cluster C3, blue dots represent genetic cluster C4.