Funding for this research was provided by:
The project is supported by The Lok Sin Tong Benevolent Society .Kowloon
Article History
First Online: 21 February 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: Ethics approval was obtained from the Survey and Behavioral Ethics Committee, the Chinese University of Hong Kong. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.