Funding for this research was provided by:
RCSI & UCD Malaysia Campus (PMC RC-17)
Received: 28 April 2020
Accepted: 10 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: This study was registered with the National Medical Research Registry (NMRR-17-1174-36384 S1) and ethical approval by Joint Penang Independent Ethics Committee (JPEC 02-18-0026). All participants gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.