Funding for this research was provided by:
The Hong Kong College of Family Physicians (Research Fellowship 2016)
Received: 20 October 2020
Accepted: 12 May 2021
First Online: 21 June 2021
: The Ethical Approval was granted by the Research Ethical Committee (Kowloon Central/Kowloon East Cluster, Hong Kong Hospital Authority) on 5/8/2016 (Ref: KC/KE-16–0109/ER-1). As only anonymous data were analyzed and patients’ clinical management had not been affected, the Research Ethical Committee has approved that neither written or verbal consent is needed for this study.
: As no individual person’s data in any form (including individual details, images or videos) had been included in the manuscript, consent to publication is not applicable for this manuscript.
: All authors have declared no conflicts of interest.