1. Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK
2. Health Sciences Faculty, University of Bristol, Bristol Veterinary School, Langford
3. Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, UK
4. Centre for Food Policy, City, University of London, London, UK
5. Centre for Evaluation of Public Health Measures, Norwegian Institute of Public Health, Oslo, Norway