Funding for this research was provided by:
Dean's strategies research fund (04187)
Received: 2 February 2019
Accepted: 4 March 2020
First Online: 14 March 2020
Ethics approval and consent to participate
: Ethical approval for the study was obtained from the Human Research Ethics Committee (2015–2016-0357) of the Education University of Hong Kong. A written consent was obtained from the participants before taking part in the study.
: Not applicable.
: There is no competing interests to declare.