Received: 21 November 2018
Accepted: 19 June 2019
First Online: 26 June 2019
Ethics approval and consent to participate
: This study was approved by the institutional ethics review boards of the six collaborating institutions (Women’s College Hospital, the Sunnybrook Health Sciences Centre, Princess Margaret Hospital, Mount Sinai Hospital, Juravinski Cancer Centre, and Lakeridge Health). All participants provided written informed consent prior to enrolment into the study.
: Not applicable.
: The authors declare that they have no competing interests.