Funding for this research was provided by:
National Medical Research Council
Received: 22 July 2020
Accepted: 7 April 2021
First Online: 22 June 2021
: The Ethics Committee of Peking University and National University of Singapore approved this study. Consent was obtained before participating in the study. We received administrative permission to access and use the data because the data collection was partly funded by our research lab.
: Not applicable.
: The authors involved do not have competing interests.