Funding for this research was provided by:
Bill and Melinda Gates Foundation
Ministry of Science and Technology, Taiwan (104-2918-I-018-008, 105-2511-S-018-015-MY5)
Article History
Accepted: 29 March 2021
First Online: 8 April 2021
Declarations
:
: The authors declare that they have no conflict of interest.
: This study was carried out with institutional review board (IRB) approval and in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: All participants were well informed about the research objectives and contents and were assured about the privacy. None of the personal identifiers was reported in the study.