Funding for this research was provided by:
Universidade de Macau (MYRG2015-00190-ICMS-QRCM, MYRG106(Y1-L3)-ICMS13-BY)
Received: 23 January 2019
Accepted: 22 November 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the University of Macau. Participants were fully informed of the objective of this study as well as their information was for academic use only. Additionally, all juvenile participants were guided or aided by their custodians, and similar assistance also provided for some elderly participants to guarantee they fully understood the questionnaire’s content and ethical issues. Written informed consent was obtained from all of the participants or their custodians.
: Not applicable.
: The authors declare that they have no competing interests.