Funding for this research was provided by:
Received: 8 August 2020
Accepted: 29 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: Ethical approval was granted by the Research Ethics Committee of the Faculty of Dentistry, Universitas Indonesia (approval no. 68/Ethical Approval/FKGUI/VIII/2019). This research was conducted in full accordance with the World Medical Association Declaration of Helsinki. The principal investigator is responsible for ensuring the confidentiality of the study documents and protecting the anonymity of all respondents. Written informed consent was provided by the parents and participating adolescents assented to participating. Written informed consent was also obtained from participants who are 16 and over.
: Not applicable.
: The authors declare that they have no competing interests.