Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Departments of Surgery, University of Toronto, Toronto, ON, Canada;
Departments of Surgery, University of Toronto, Toronto, ON, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;
Department of Surgery, Lethbridge Regional Hospital, Lethbridge, AB, Canada;
Department of Surgery, University of Calgary, Calgary, Alberta, Canada;