In the original published version of this article, the ethics and consent statement did not provide full details regarding the ethics approval and consent.
The original manuscript showed the statement as:
The Ethics Committee of the Universidad del Desarrollo approved this study. Data production was completed in coordination with each educational establishment after having first obtained passive informed consent from parents or guardians and active informed consent from students. The students of the schools belonging to grades 9 to 12 were previously invited to participate in the study during the regular online class period, being included in the study all those who voluntarily agreed to participate, those that were in the virtual classroom at the time of the application and those who did not have a refusal to participate by their parents. The data collection exercise lasted 45 min on average and was performed by the research team by sending the access link to the questionnaire available on the Alchemer Survey platform during the regular online class schedule.
The article has been updated to provide additional information on the consent procedure and ethics approval date.
The corrected version of the statement can be found below:
The Ethics Committee of the Universidad del Desarrollo approved this study on 14th May 2018 (valid through to July 2021), project number 1180607. Data production was completed in coordination with each educational establishment after having first obtained passive informed consent from parents or guardians and active informed consent from students. Parents/guardians were informed about the study via written communication and were given the opportunity to opt out if they did not wish their child to participate. Written assent was obtained from all adolescent participants before their involvement in the study. The students of the schools belonging to grades 9 to 12 were previously invited to participate in the study during the regular online class period, being included in the study all those who voluntarily agreed to participate, those that were in the virtual classroom at the time of the application and those who did not have a refusal to participate by their parents. The data collection exercise lasted 45 min on average and was performed by the research team by sending the access link to the questionnaire available on the Alchemer Survey platform during the regular online class schedule.
The authors apologize for the errors.
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
The authors declare no competing interests.