Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (401217/2016-7)
Text and Data Mining valid from 2019-06-26
Received: 16 March 2019
Accepted: 18 June 2019
First Online: 26 June 2019
Compliance with ethical standards
: The authors have no professional or financial conflicts of interest to disclose.