Received: 29 June 2021
Accepted: 18 October 2021
First Online: 29 October 2021
: This study was registered in the Malaysia National Medical Research Registry (NMRR-20-732-54372) and obtained the approval of Malaysian Medical Research and Ethics Committee (MREC) [KKM/NIHSEC/P20–1053(4)].All research procedures were conducted according to the Malaysian Guidelines Good Clinical Practice (4th edition) and other relevant guidelines for research. Written informed consent was obtained from all the participants and also from legal guardians of the participants (with no formal education if there are any illiterates) before their participation.
: Not applicable.
: The authors declare no conflict of interest.