Funding for this research was provided by:
National Medical Research Council (NMRC/TCR/011-NUHS/2014, NMRC/CSA/0050/2013)
Text and Data Mining valid from 2020-04-07
Received: 25 October 2019
Accepted: 26 March 2020
First Online: 7 April 2020
Ethics approval and consent to participate
: Ethics approval were approved by the Domain Specific Review Board of the National Healthcare Group, Singapore (NHG-DSRB; DSRB study codes 2012/02212, 2015/01200, 2017/00340). All study participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.