Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (449485/2014-5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES/PROEX ? Process numbers: 23038.005848/2018-31 and 88882.182142/2018-01)
Text and Data Mining valid from 2019-02-04
Received: 29 October 2018
Accepted: 28 January 2019
First Online: 4 February 2019
Compliance with ethical standards
: The authors declare that they no conflicts of interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Infromed consent was obtained from all individual participants in the study.