Funding for this research was provided by:
Thai Health Promotion Foundation
Received: 4 June 2020
Accepted: 4 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The study was granted an exemption from requiring ethics approval by Khon Kaen University Ethics Committee in Human Research in 5 June 2018, in according to KKU’s Announcement No. 1877/2559.
: Not applicable.
: The authors declare that they have no competing interests.