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. 2017 Mar 31;7(3):e012719. doi: 10.1136/bmjopen-2016-012719

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt and build upon this work, for commercial use, provided the original work is properly cited. See: http://creativecommons.org/licenses/by/4.0/

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Study sites in Ganjam and Gajapati districts, Odisha, India, with intervention villages in black and control villages in white. Inset shows location of districts in India.