Funding for this research was provided by:
Health and Medical Research Fund (05060781)
Received: 24 August 2018
Accepted: 31 May 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: This study protocol was approved by the Department of Health Ethics Committee and the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster. Informed consent from students and their families has been obtained prior to their participation in the Student Health Service.
: Not applicable.
: MPW is a member of the editorial board of BMC Public Health. All other authors declare that they have no competing interests.