1 Department of Obstetrics and Gynaecology (Lim, Simpson, Shirreff), University of Toronto; Department of Obstetrics and Gynaecology (Simpson), St. Michael's Hospital/Unity Health Toronto; Department of Obstetrics and Gynaecology (Shirreff), Mount Sinai Hospital, Toronto, Ont. justinwj.lim@mail.utoronto.ca.
2 Department of Obstetrics and Gynaecology (Lim, Simpson, Shirreff), University of Toronto; Department of Obstetrics and Gynaecology (Simpson), St. Michael's Hospital/Unity Health Toronto; Department of Obstetrics and Gynaecology (Shirreff), Mount Sinai Hospital, Toronto, Ont.