1 Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada. Electronic address: maggie.flemming@dal.ca.
2 Division of General Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada.
3 Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
4 Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada; Division of Cardiac Surgery, Department of Surgery, Dalhousie University, Halifax, Nova Scotia, Canada.
5 Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada; Division of Cardiology, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.