1. London Health Sciences Centre, London, Ontario; Department of Anesthesia and Perioperative Medicine, Faculty of Medicine, University of Western Ontario, London, Ontario
2. London Regional Cancer Program, London Health Sciences Centre, London, Ontario
3. Tom Baker Cancer Centre, Alberta Cancer Board, Calgary, Alberta; Division of Palliative Medicine, University of Calgary, Calgary, Alberta
4. Cross Cancer Institute, Alberta Cancer Board, Edmonton, Alberta; Department of Oncology, University of Alberta, Edmonton, Alberta