Funding for this research was provided by:
Received: 20 February 2020
Accepted: 26 June 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: Ethical approval was obtained through the Ethical Committee for Medical Research of the Institute of Public Health of the Federal University of Bahia, Brazil, clearance no. 120.616. Written informed consent was obtained from the legal guardian of each individual if they were under 18 years, and themselves if they were older than 18 years old.
: Not applicable.
: The authors declare that they have no competing interest.