Received: 6 January 2021
Accepted: 1 April 2021
First Online: 14 April 2021
: This study was conducted in strict adherence with the principles of the Declaration of Helsinki. The present study received approval from the Ethics Committee of the Federal University of Minas Gerais under process number ETIC 187/07. All participants were informed about the aims of the research and signed a written informed consent form. Those who were illiterate used their thumb-print to provide consent and informed consents from their legally authorized by representants for participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.