Received: 10 April 2019
Accepted: 25 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: This study was approved by Human Research Ethics Committee of Universidade Federal de Ouro Preto (protocol number 858,572). All participants had to sign the informed consent form to be included in the study. Written consent was also obtained from the mother/guardian of all participating adolescents before any procedure was carried out.
: Not applicable.
: The authors declare that they have no competing interests.