Funding for this research was provided by:
Kerry Group Kuok Foundation (NA)
Received: 13 January 2020
Accepted: 7 October 2020
First Online: 14 October 2020
Ethics approval and consent to participate
: This study has been approved by the Institutional Review Board of Hong Kong University and Hospital Authority Hong Kong West Cluster (Reference number: UW 17–179). Informed written consent was obtained by the parents for both child participation and their own participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.