1. System Dynamics Group, Department of Geography University of Bergen Bergen Norway
2. Department of Human Biology University of Cape Town Cape Town South Africa
3. Faculty of Public Health Policy London School of Hygiene and Tropical Medicine London UK
4. Department of Nutrition, Institute of Basic Medical Sciences University of Oslo Oslo Norway
5. Department of Health and Caring Services Western Norway University of Applied Science Bergen Norway
6. Department of Health Promotion and Development, Faculty of Psychology University of Bergen Bergen Norway
7. Department of Social & Policy Sciences University of Bath Bath UK
8. MGH Institute for Technology Assessment, Harvard Medical School Harvard University Boston Massachusetts USA