1. Department of Family and Community Medicine, Division of Palliative Care, University of Toronto, Toronto, Ontario, Canada.
2. Department of Psychosocial Oncology and Palliative Care, Princess Margaret Cancer Centre, Toronto, Ontario, Canada.
3. Department of Medicine, Division of Physiatry, University of Toronto, Toronto, Ontario, Canada.
4. Department of Family Medicine, University of British Columbia, Vancouver, British Columbia, Canada.