Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq Process number 401330/2014-1)
Text and Data Mining valid from 2018-11-26
Received: 19 March 2018
Accepted: 15 November 2018
First Online: 26 November 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.