Received: 7 January 2020
Accepted: 5 May 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The study protocol was approved by the National Medical Research Register Malaysia and clinical research center of concerned hospital (Registration number: NMRR-18-1482-42075). Written informed consent was obtained from all participants.
: We would like to thank the Director-General of Health, Malaysia for his permission to publish this study.
: The authors declare that they have no conflict of interest.