Nguyen, Dang
Luo, Wei
Venkatesh, Svetha
Phung, Dinh
Article History
Received: 14 February 2018
Accepted: 26 March 2018
First Online: 11 April 2018
Compliance with Ethical Standards
:
: The authors have no conflict of interest to declare.
: Ethics approval was obtained from the New South Wales Population and Health Services Research Ethics Committee (AU RED Reference: HREC/15/CIPHS/1).
: This study is a secondary analysis of routinely collected data, and the consent had been obtained by the original data guarantor.