Received: 17 July 2019
Accepted: 13 January 2020
First Online: 22 January 2020
Ethics approval and consent to participate
: Ethical approval for this study was obtained by the Norwegian Regional Committees for Medical and Health Research Ethics (2016/1195) and the University of Public Health, the Ministry of Health, Republic of the Union of Myanmar. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.