Funding for this research was provided by:
the Research Grants Council of the Hong Kong (17126115)
Text and Data Mining valid from 2019-03-13
Received: 26 December 2017
Accepted: 4 March 2019
First Online: 13 March 2019
: HMW is a Clinical Associate Professor in Paediatric Dentistry in the Faculty of Dentistry, The University of Hong Kong and a Fellow in Dental Surgery of the Royal College of Surgeons of Edinburgh, the Hong Kong Academy of Medicine, and the College of Dental Surgeons of Hong Kong in Paediatric Dentistry. SMP is a part-time Clinical Lecturer in Paediatric Dentistry in the Faculty of Dentistry, The University of Hong Kong. Currently, she is also in private practice. CPJM is a Clinical Professor in Dental Public Health in the Faculty of Dentistry, The University of Hong Kong.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.Participants’ parents or legal guardians provided their written consent and the participants were asked to provide their verbal assent. To guarantee confidentiality, identifying information was replaced by de-identified data file after linkage identifiers were created. Ethics approval was obtained from the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (reference number: UW 12–140).
: Not applicable.
: The authors declare that they have no competing interest.
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