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Article History

Received: 4 February 2023

Accepted: 9 October 2023

First Online: 16 October 2023

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 according to national regulations. 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 was 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. The interview was stopped or interrupted at any time by the respondents without incurring any consequences. Information from the two surveys, including any personal data, was kept confidential and is only used for research.

: Not applicable.

: The authors declare no competing interests.