Funding for this research was provided by:
Health and Medical Fund, Hong Kong Government (02181028)
Article History
Received: 1 August 2019
Accepted: 23 September 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: Research ethics approval was granted by the Tung Wah College Human Research Ethics Committee (TWC HREC) on 14 February 2019. HREC reference number: REC2018020.Written informed consent will be obtained from participants during recruitment on site and prior to data collection. Consent to use the data collected for scientific reporting and publication will also be obtained at the same time as the consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.