Funding for this research was provided by:
National Medical Research Council (NMRC/CG/C026/2017_NUHS)
Accepted: 8 February 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: Ethics approval was provided by the National University of Singapore Institutional Review Board (Reference Code S-19-007). Participants provided written informed consent to participate.
: The authors declare that they have no competing interests.