Text and Data Mining valid from 2019-12-01
Received: 24 July 2019
Accepted: 22 November 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: The study was approved by the Committee for Ethics in Human and Social Sciences of the University of Brasília. All participants were properly informed of their rights. Informed consent forms were signed by those who agreed to participate.
: Not applicable.
: The authors declare that they have no competing interests.