1. DM Wilson (corresponding author): Faculty of Nursing, University of Alberta, Level 3, Edmonton Clinic Health Academy, 11405 87 Avenue, Edmonton, Alberta, Canada T6G 1C9;
2. End-of-Life Care Research Group, Ghent University and Vrije Universiteit Brussel, Brussels, Belgium
3. Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada
4. Centre for Health Economics and Policy Analysis, Department of Clinical Epidemiology and Biostatistics, and School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario, Canada
5. Department of General Practice and Primary Health Care, School of Population Health, University of Auckland, Auckland, New Zealand