Lau, Sally C.
Abdel-Rahman, Omar
Cheung, Winson Y.
Article History
Received: 10 July 2018
Accepted: 31 July 2018
First Online: 4 August 2018
Compliance with ethical standards
:
: The authors declared that they have no competing interest.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Specifically, the Health Research Ethics Board (HREB) approved this study before its conduct.
: Because this study was a secondary analysis of retrospective data, there was no direct contact with any participants. Therefore, informed consent was waived by the ethics committee.