Funding for this research was provided by:
Research Grant Council, The Hong Kong Special Administrative Region (24606618)
Received: 12 October 2018
Accepted: 13 May 2019
First Online: 20 June 2019
Ethics approval and consent to participate
: The study was approved by the Joint Chinese University of Hong Kong CUHK-New Territories East Cluster Clinical Research Ethics Committee (2017.665). Written informed consent will be obtained from participants and parents prior to enrolment in the study. The study will be undertaken according to the ICH-GCP Guidelines.
: Not applicable.
: The authors declare that they have no competing interests.