Article History
Received: 10 November 2020
Accepted: 29 December 2020
First Online: 12 January 2021
Ethics approval and consent to participate
: We have ethical approval from The Joint Chinese University of Hong Kong – New Territories East Cluster Clinical Research Ethics Committee (CREC Ref. No. 2019.709) in which patient consent is waived.
: Not applicable.
: The authors declare that they have no competing interests.