Funding for this research was provided by:
National Healthcare Group-Lee Kong Chian School of Medicine, Nanyang Technological University (CSPP-17001)
Received: 13 February 2020
Accepted: 2 September 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: The study protocol was approved by the National Healthcare Group Domain Specific Review Board in May 2017 (Reference: 2016/01280). Written informed consent was obtained from all participants prior to their participation in the study.
: Not applicable.
: The authors declare no conflict of interest.