Funding for this research was provided by:
Ministry of Higher Education, Malaysia (Grant no. 600-RMI/LRGS 5/3 (2/2011))
Ministry of Science, Technology and Innovation, Malaysia (Grant no. 07-05-IFN BPH 010)
Received: 9 June 2020
Accepted: 15 March 2021
First Online: 23 March 2021
: This study was approved by the Research Ethics Committee of Universiti Teknologi MARA. Reference number: REC/UITM/2007(10). Written informed consent was obtained from all participants prior to their study enrolment.
: Not applicable.
: The authors declare no competing interests.