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. 2016 Apr 11;6:24321. doi: 10.1038/srep24321

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Copyright © 2016, Macmillan Publishers Limited

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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The figure was generated by obtaining the map of Hanzhou city from Zhejiang Administration of Surveying Mapping and Geoinformation (ZheS(2010)280) with the agency’s permission and further refined by Adobe Photoshop CS2 software.