Text and Data Mining valid from 2020-01-03
Received: 3 June 2019
Accepted: 22 December 2019
First Online: 3 January 2020
Ethics approval and consent to participate
: This study was approved with the need for informed consent waived by the Sunnybrook Health Sciences Centre (SHSC) Research Ethics Board on February 3, 2014. Permission to access the data following publication of the study by individuals other than study investigators was not covered under ethics approval and would require alternate approval.
: Not applicable.
: The authors declare that they have no competing interests.