1. Professor, Centre for Health Economics and Policy Analysis, McMaster University, Hamilton, Canada and Professor, Centre for Health Economics, Institute of Population Health, University of Manchester, Manchester, UK
2. Research Associate, Centre for Health Economics, Institute of Population Health, University of Manchester, Manchester, UK
3. Professor, Centre for Health Economics, Institute of Population Health, University of Manchester, Manchester, UK
4. Research Fellow, Centre for Health Economics, Institute of Population Health, University of Manchester, Manchester, UK