Funding for this research was provided by:
Health and Medical Research Fund (14152711)
National Natural Science Foundation of China (71974165)
Received: 18 June 2020
Accepted: 14 June 2021
First Online: 26 June 2021
: The study ethics, as well as the verbal consent procedure, was approved by the Survey and Behavioral Research Ethics Committee of the Chinese University of Hong Kong. Verbal consent was also obtained from the participants.
: Not applicable.
: As a member of the editorial board of the journal, KCC was not involved in the peer review process of this article. The other authors declare that they have no competing interests.