Funding for this research was provided by:
National Medical Research Council (C008A, 0027)
Article History
Received: 14 February 2019
Accepted: 21 March 2019
First Online: 6 April 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study is approved by SingHealth ethical board CIRB Ref No.: 2018/2073.
: For this type of study, formal consent is not required.