Funding for this research was provided by:
Sanming Project of Medicine in Shenzhen (SZSM201612018)
The MOE (MINISTRY OF EDUCATION IN CHINA) project of Humanities and Social Sciences, China (10YJA630004)
Received: 10 April 2020
Accepted: 31 July 2020
First Online: 5 August 2020
Ethics approval and consent to participate
: Ethical approval for the study was obtained from The Institutional Review Board of the University of Hong Kong / Hospital Authority Hong Kong West Cluster (UW17–509). All potential participants were provided written information on this study and told that their participation was voluntary and without prejudice before written consent was obtained. All the information obtained from the participants remained confidential and anonymous. In addition, the dissemination of the study findings does not refer specific objects but the general source population.
: No consent to publish was needed for this study as we did not use any details, images or videos related to individual participant.
: The authors have declared that no competing interests exist.