Funding for this research was provided by:
Research Grants Council, University Grants Committee (17156416)
Text and Data Mining valid from 2019-01-30
Received: 19 November 2018
Accepted: 16 January 2019
First Online: 30 January 2019
Ethics approval and consent to participate
: Ethics was approved by the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (HKU/HA HKW IRB) Reference #: UW 17-201. All subjects consented to participate in the study.
: Not applicable
: The authors declare that they have no competing interests.
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