Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado de São Paulo (2012/19278-6, 2013/08216-2)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (443719/2014-4, 305985/2014-0)
Received: 20 September 2017
Accepted: 7 February 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: All procedures involving humans were approved by the Ethics Committee of the University Hospital of the Federal University of Sergipe and Comissão Nacional de Ética em Pesquisa, Brazil (CONEP).
: Not applicable.
: The authors declare that they have no competing interests.
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