Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (305187/2018-0)
Text and Data Mining valid from 2019-07-22
Received: 14 January 2019
Accepted: 8 July 2019
First Online: 22 July 2019
Consent for publication
: Not applicable.
: The authors declare that they have no competing interests.