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. 2013 Jan 17;7(1):e1990. doi: 10.1371/journal.pntd.0001990

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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.

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A: Kamphaeng Phet (box), Thailand is located approximately 300 km Northwest of Bangkok (star). B: Map of study area in Muang District, Kamphaeng Phet, Thailand. The locations participating schools are indicated by black boxes and the villages that feed the schools are indicated with triangles. All houses within the villages in this study were GIS mapped, KT, Kon Tee; NB, Na Bo Kham; NC, Nakon Chum; NP, Nong Pling; TN, Thep Na Korn. C: A representational GIS mapping of two villages (5 and 15) to indicate the varying density of houses with the villages.