Funding for this research was provided by:
Health and Medical Research Fund (10111861)
Article History
Received: 15 January 2020
Accepted: 3 November 2020
First Online: 16 November 2020
Ethics approval and consent to participate
: All study procedures were reviewed prior to the commencement of subject recruitment and approved by the Human Subjects Ethics Application Review Committee of the Hong Kong Polytechnic University (HSEARS20140416004). All of the participants gave their written informed consent to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.