1. Department of Archaeological Sciences; University of Bradford; Bradford West Yorkshire BD7 1DP UK
2. PACEA UMR 5199, Laboratoire d'Anthropologie des Populations Passées et Présentes; Université de Bordeaux; Bat. B8, Allee Geoffroy St Hilaire, CS 50023, 33615 Pessac Cedex France
3. Department of Chemical and Forensic Sciences; University of Bradford; Bradford West Yorkshire BD7 1DP UK