Funding for this research was provided by:
Universiti Brunei Darussalam (UBD/OAVCRI/CRGWG (009)/170401)
Accepted: 27 January 2021
First Online: 11 February 2021
Compliance with Ethical Standards
: The authors have no financial or non-financial conflict of interests with respect to this manuscript.
: This study was performed in accordance with the Declaration of Helsinki. Ethical approval was obtained from the Medical and Health Research and Ethic Committee (MHREC) of Ministry of Health, Brunei Darussalam (MHREC/EDU/2017/7(1)).
: All participants provided informed (written) consent before taking part.