Funding for this research was provided by:
University Grants Committee (UGC/FDS17/M01/16)
Article History
Received: 29 May 2019
Accepted: 22 October 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: The study was approved by the Hospital Authority Research Ethics Committee (Kowloon Central/Kowloon East) (Ref No. KC/KE-16-0225/ER-1). Written informed consent to participate is obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.