1. Geriatrics & Palliative Care & Pain Medicine, Baycrest Health Sciences, Toronto, Canada;
2. Department of Family and Community Medicine, University of Toronto, Toronto, Canada;
3. Division of Palliative Care, University of Toronto, Toronto, Canada;
4. Schulich School of Medicine & Dentistry, Weston University, London, Canada;
5. Baycrest Health Sciences, Toronto, Canada