Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (3381/2013)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (304413/2015-1)
Text and Data Mining valid from 2020-01-29
Received: 26 September 2019
Accepted: 9 January 2020
First Online: 29 January 2020
Ethics approval and consent to participate
: Ethical consent was obtained according to the Helsinki Declaration. Ethical approval was obtained from the Research Ethics Committee of the Federal University of Rio Grande do Norte, Federal University of Piauí, and Federal University of Ceará, under protocol numbers 27,493,614.0.0000.5293, 0443.0.045.000–11, and 702/04, respectively. Before signing the Consent Form participants were informed regarding the nature of this research and use of their biological samples. All the analyses were performed preserving subjects anonymously throughout the study.
: Not applicable.
: The authors declare that they have no competing interests.