Funding for this research was provided by:
Thai Health Promotion Foundation (61-00073)
Received: 10 August 2020
Accepted: 9 November 2020
First Online: 16 November 2020
Ethics approval and consent to participate
: This study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures involving research study participants were approved by the Institutional Review Board (IRB) of the Institute for Population and Social Research of Mahidol University (COA. No. 2018/02–070). Written informed consent was obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interests.