Funding for this research was provided by:
Universidade de Macau (MYRG-2014-124, MYRG-2014-111)
Article History
Received: 29 October 2018
Accepted: 15 February 2019
First Online: 23 February 2019
Ethics approval and consent to participate
: The University of Macau research ethics panel approved the study. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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