Text and Data Mining valid from 2018-09-21
Received: 6 September 2017
Accepted: 14 September 2018
First Online: 21 September 2018
Ethics approval and consent to participate
: The Joint Chinese University of Hong Kong – New Territories East Cluster Clinical Research Ethics Committee approved this study. A written informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no competing interests.
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