Funding for this research was provided by:
King's College London-University of Hong Kong Global Partnerships Fund
Received: 5 October 2020
Accepted: 4 April 2021
First Online: 13 April 2021
: Ethics approval for this study was obtained from the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (UW18–469) and the Kowloon Central/Kowloon East Research Ethics committee (KC/KE-18-0214).
: Not applicable.
: The authors declare no competing interest.