Funding for this research was provided by:
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
Received: 6 February 2022
Accepted: 10 May 2022
First Online: 28 May 2022
: The project protocol was approved by the Mahidol University Review Board. (Certificate of approval No: 2019/056). In accordance with the regulations from the MUSSIRB, adolescents age 18 years or older can make decisions regarding their own health (including participation in health studies), and thus gave consent themselves to participate in the current study. Parents/guardians have the right to be informed and, in the current study, all parents/guardians received written information about the study in advance. School attendance data are based on the official reports from the teachers. The students who consented to participate in the study received a password on the day data were collected in each school by appointment in advance by the researchers.
: Not applicable.
: There is no conflict of interest to be reported about this article.