Funding for this research was provided by:
Fondecyt Regular, Chile (1141295)
Received: 7 August 2020
Accepted: 26 December 2020
First Online: 8 January 2021
Ethics approval and consent to participate
: The study protocol was approved by the Ethic Committee of the Universidad Autónoma de Chile, UA 238/2014. Parents and guardians provided informed written consent for their children under the age of 16 participating in the study. In addition, all students under and over the age of 16 in the study provided written informed consent acknowledging their consent to participate and their understanding of the research procedures and objectives.
: Not applicable.
: The authors declare that they have no competing interests.