Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (171250/2017, 306848/2017, 421014/2018)
Text and Data Mining valid from 2019-11-07
Received: 14 August 2019
Accepted: 30 October 2019
First Online: 7 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.