Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (302131/2012-4)
Received: 24 July 2017
Accepted: 6 March 2018
First Online: 20 March 2018
: The study was approved by the Ethics Committee of the Federal University of Campina Grande, Brazil — protocol number 48–2012.
: Not applicable.
: The authors declare that they have no competing interests.
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