Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (001)
Text and Data Mining valid from 2019-11-14
Received: 26 May 2019
Accepted: 1 November 2019
First Online: 14 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.