See, Kay Choong http://orcid.org/0000-0003-2528-7282
Ong, Venetia
Tan, Yi Lin
Sahagun, Juliet
Taculod, Juvel
Article History
Received: 2 January 2018
Accepted: 22 June 2018
First Online: 18 August 2018
Ethics approval and consent to participate
: Our Ethics Review Board (National Healthcare Group Domain-Specific Review Board) approved the study (approval number DSRB B/2013/00132). As the study is a retrospective observational one, the need for patient consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
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