Funding for this research was provided by:
This study was supported by a Polytechnic University Direct grant (in HK) and an NCIS Seed Funding Grant, National Medical Research Council (Singapore). (n/a)
Received: 12 March 2019
Accepted: 11 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Ethical approval of the original study was obtained from the ethics committees of the Hong Kong Polytechnic University, Hong Kong; Central Cluster of the Hospital Authority, Hong Kong; The National University Hospital; Singapore; The University of Manchester, Manchester, UK; and the Central Manchester Research and Ethics Committee. Written informed consent was prvided to all participants.
: Not applicable.
: The authors declare that they have no competing interests.