First Online: 31 May 2021
: Ethical approvals for the study were obtained from the Medical Research Ethics Committee (MREC), Ministry of Health Malaysia (NMRR-17-423-34969) and Queen Mary (University of London) Research Ethics Committee (QMERC2017/14) prior to conducting the study. Informed written consent was collected from all respondents at the beginning of the study.
: Not applicable.
: The authors declare that they have no competing interests.