1. Royal Institute for Cultural Heritage; Jubelpark 1 B-1000 Brussels Belgium
2. Ghent University; Isotope Bioscience Laboratory - ISOFYS, Faculty of Bioscience Engineering; Coupure Links 653 B-9000 Gent Belgium
3. Ghent University; Department of Archaeology; Sint-Pietersnieuwstraat 35 B-9000 Ghent Belgium