Funding for this research was provided by:
National social science foundation of the national planning office for philosophy and social sciences (15ZDB167)
Universidade de Macau (MYRG2015-00172-ICMS-QRCM, MYRG2016-00144-ICMS-QRCM)
Fundo para o Desenvolvimento das Ciências e da Tecnologia (FDCT013/2015/A1)
Article History
Received: 10 January 2018
Accepted: 22 January 2019
First Online: 1 February 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of the China Pharmaceutical University. The approval number is CPU2016018. The written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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