1. Department of Archaeology and Anthropology, University of Cambridge, UK
2. McDonald Institute for Archaeological Research, University of Cambridge, UK
3. MRC Dunn Human Nutrition Unit, Wellcome Trust/MRC, Building, Cambridge, UK
4. Department of Food and Nutritional Sciences, University of Reading, UK
5. Department of Public Health and Primary Care, MRC Centre for Nutritional Epidemiology in Cancer Prevention and Survival, University of Cambridge, UK