Funding for this research was provided by:
Health and Medical Research Fund (14150801)
Received: 21 October 2020
Accepted: 16 April 2021
First Online: 28 April 2021
: This study was approved by the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (Reference Number: UW 17–011). Each participant included in the study gave the written informed consent.
: The authors declare that they have no competing interests.