Funding for this research was provided by:
Seed Funding Program for Basic Research of The University of Hong Kong
Received: 3 March 2019
Accepted: 28 November 2019
First Online: 10 December 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the local Institutional Review Board of The University of Hong Kong/Hospital Authority Hong Kong West Cluster (UW 16–170). Offering participation stipend to each respondent was approved by the Institutional Review Board. Written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.