Text and Data Mining valid from 2019-03-29
Received: 15 May 2018
Accepted: 18 March 2019
First Online: 29 March 2019
Ethics approval and consent to participate
: The Ethics Review Committee, Department of Medical Research, Myanmar and the Institutional Review Board, Institute for Population and Social Research, Mahidol University, Thailand approved the conduct of this study. Written informed consent was obtained from all respondents while personal attributes were kept confidential.
: Not applicable.
: The authors declare that they have no competing interests.
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