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. 2015 Apr 14;12(4):4170–4184. doi: 10.3390/ijerph120404170

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Mapping the geo-referenced communities and the circle links from the location network. The red links indicated the major critical links. The widths of the red links are proportional to their edge betweenness.