Text and Data Mining valid from 2019-11-22
Received: 30 August 2019
Accepted: 12 October 2019
First Online: 22 November 2019
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: The Ethical Committee of the Federal University of Ouro Preto, MG approved this study (Res. 196/96—CAAE 56307716.2.0000.5150).
: All individuals received written information and gave written consent about the risks and benefits of the research.