Funding for this research was provided by:
National Medical Research Council (HSRGDB16Jul013)
Received: 4 September 2019
Accepted: 25 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: This study has been registered under clinicaltrials.gov (identifier: NCT03324737). Ethics approval has been obtained from the Domain Specific Review Board (DSRB) of the National Healthcare Group, Singapore (reference number 2017/00447). Protocol amendments will be submitted to DSRB for approval as needed. Written informed consent will be obtained from all study participants.
: Not applicable.
: The authors declare that they have no competing interests.