Received: 30 April 2020
Accepted: 13 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: This study was registered in the Malaysia National Medical Research Registry (NMRR-18–2029-43008) and obtained the approval of Medical Research and Ethics Committee (MREC). Written informed consent was obtained from all the participants before their participation.
: Not applicable.
: The authors had no conflict of interest to declare.