Received: 5 December 2018
Accepted: 17 May 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: This study has been approved by the Public Health Ontario Ethics Review Board (File no.2016–034.01). The need for informed consent to participate was waived due to the retrospective nature of this study.
: Not applicable.
: The authors of this study declare that they have no competing interests.