Received: 19 September 2021
Accepted: 3 August 2022
First Online: 29 August 2022
: This study was approved by the Human Research Ethics Committee at the University of Hong Kong (EA200080). Participants were asked for informed consent and signed an informed consent form prior to participation in the study. All methods were performed in accordance with the relevant guidelines and regulations following the integrity and the guideline of research ethics and policy under the Human Research Ethics Committee at the University of Hong Kong.
: This study does not contain any individual person’s data in any form (including any individual details, images or videos). Therefore, no consent for publication is asked.
: The authors declare that they have no competing interests.