Dang, Truc Ngoc Hoang http://orcid.org/0000-0001-5466-7140
Le, Duc Dung http://orcid.org/0000-0003-1605-8496
Article History
Received: 10 March 2024
Accepted: 2 July 2024
First Online: 13 July 2024
Declarations
:
: The need for ethical approval was waived by the Ethical Board of Institute for Population and Social Research, Mahidol University, Thailand and the Institute of Social and Medical Studies, Vietnam or is deemed unnecessary. Because the study used only secondary data and no personally identifiable data was used in the analysis or dissemination of the results of this study.
: The informed consent taken from all the participants. All methods were carried out in accordance with relevant guidelines and regulations/ Declaration of Helsinki. All participants and their authorized representatives were given a thorough explanation of the research’s goals and contents by the researchers. Before the interview, their signatures were obtained on the informed consent forms. The interview might be stopped or interrupted at any time by the respondents without incurring any consequences. Information from the two surveys, including any personal data, is kept confidential and is only used for research.
: Not applicable.
: The authors declare that they have no competing interests.