Funding for this research was provided by:
National Medical Research Council (NMRC) Programme Project Grant (NMRC/PPG/KKH/2010)
Text and Data Mining valid from 2019-08-13
Received: 29 July 2018
Accepted: 31 July 2019
First Online: 13 August 2019
Ethics approval and consent to participate
: Approval of the study was obtained on 04 June 2010 from the SingHealth Centralised Institutional Review Board Ethics Committee, Singapore (CIRB Ref No. 2010/214/D). All participants gave written informed consent before the study began.
: Not applicable.
: The authors declare that they have no competing interests.