Funding for this research was provided by:
St. James Settlement of Hong Kong (120,000HKD)
Text and Data Mining valid from 2018-05-04
First Online: 4 May 2018
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of City University of Hong Kong and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all participants included in the study.