Funding for this research was provided by:
Sunway University (Research Centre Grant 2020 (STR-RCTR-CVVR-01-2020))
Sunway University
Article History
Received: 9 September 2020
Accepted: 8 January 2021
First Online: 30 January 2021
Compliance with ethical standards
:
: The authors declare that there is no conflict of interest.
: No ethical statement is needed since this is a review paper.