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. 2015 Jan 8;15:4. doi: 10.1186/s12879-014-0732-8

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© Sangenis et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Study areas. Guarani, municipality of São Sebastião do Alto, and Boa Esperança and Valão dos Milagres, municipality of São Fidélis, located to the north of Rio de Janeiro State.