Funding for this research was provided by:
JurongHealth Internal Research & Development (R&D) Grant. (-)
Received: 28 February 2019
Accepted: 29 May 2019
First Online: 18 June 2019
Ethics approval and consent to participate
: Ethics approval was granted by the Domain Specific Review Board (NHG DSRB Ref: 2014/00878), and informed consent was not required since this was an observational study where no attempt was made to change the standard of care.
: Not applicable
: The authors declare that they have no competing interests.