1. Health Economist and Senior Scientist, Health Systems Research and Consulting Unit, Centre for Addiction and Mental Health, Toronto, Ontario; Associate Professor, Department of Psychiatry, University of Toronto, Toronto, Ontario
2. Research Fellow and Editor of Eurohealth, Personal Social Services Research Unit, London School of Economics and Political Science, London, England
3. Professor, Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at University of California, Los Angeles, California