Cheung, Johnny T. K. http://orcid.org/0000-0001-7455-5218
Yu, Ruby
Wu, Zimu
Wong, Samuel Y.S.
Woo, Jean
Article History
Received: 26 March 2018
Accepted: 19 June 2018
First Online: 25 June 2018
Ethics approval and consent to participate
: The study was performed in accordance with the Declaration of Helsinki. Ethics approval was granted by the Survey and Behavioural Research Ethics Committee of the Chinese University of Hong Kong. Written consent was obtained before the start of the survey.
: Not applicable
: The authors declare that they have no competing interests.
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