Funding for this research was provided by:
SingHealth Foundation (SHF/HSRAg004/ 2015)
Text and Data Mining valid from 2019-04-23
Received: 26 October 2018
Accepted: 28 March 2019
First Online: 23 April 2019
Ethics approval and consent to participate
: The SingHealth Centralized Institutional Review Board issued the ethical approval for this study (reference number: CIRB 2016/2294).
: Not applicable
: The authors declare that they have no competing interests.
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