Funding for this research was provided by:
Start-up fund (P0000247;1-BE1S)
Received: 25 June 2020
Accepted: 5 January 2021
First Online: 14 January 2021
Ethics approval and consent to participate
: This study was approved by the Human Subjects Ethics Sub-Committee of the Hong Kong Polytechnic University (Reference No.: HSEARS20190618003). All the participants provided their written informed consent prior to participation. The participants were assured of their anonymity and confidentiality, and their rights of withdrawal were respected.
: Not Applicable.
: The authors report no conflict of interest relevant to this study.