Funding for this research was provided by:
health and medical research fund (12130691)
Received: 22 July 2021
Accepted: 12 November 2021
First Online: 8 December 2021
: This is a registered clinical trial (CCRB Clinical Trials Registry, CUHK, CUHK_CCT00440. Registered 04 December 2014, ExternalRef removed). Ethics approval was obtained from the Joint Chinese University of Hong Kong-New Territories East Cluster Clinical Research Ethics Committee (2014.542-T). Participants gave their written informed consent before participation and were free to withdraw at any stage of the study.
: Not applicable.
: The authors declare that they have no competing interests.