Fang, Christian X.
Liu, Ruiping
Yee, Dennis K. H.
Chau, Jackie
Lau, Tak-Wing
Chan, Rebecca
Woo, Siu-Bon
Wong, Tak-Man
Fang, Evan
Leung, Frankie
Article History
Received: 25 November 2019
Accepted: 22 June 2020
First Online: 29 June 2020
Ethics approval and consent to participate
: Ethical approval is not required for secondary data according to regional guidelines as set out by the Hospital Authority Head Office Steering Committee on Research Ethics (ExternalRef removed).
: Not applicable.
: The authors declare they have no competing interests.