1. York Biomedical Research Institute, Hull York Medical School, University of York, Heslington, York, UK
2. Centre for Health Economics, University of York, Heslington, York, UK
3. MMGH Consulting, Zurich, Switzerland
4. Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
5. Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands