1. Clinic for Orthopaedic Surgery of Companion Animals; 3068SB Rotterdam The Netherlands
2. Department of Archaeology; University of Leiden; 2333 CC Leiden The Netherlands
3. Monrepos Archaeological Research Centre and Museum for Human Behavioural Evolution; 56567 Neuwied Germany
4. Service of Prehistory; University of Liège; 4000 Liège Belgium
5. Department of Clinical Sciences of Companion Animals; Utrecht University; 3508TD Utrecht The Netherlands
6. Archäologisches Museum Frankfurt; Karmelitergasse 1D-60311 Frankfurt am Main; Germany
7. LVR-Landesmuseum Bonn, Rheinisches Landesmuseum für Archäologie; Kunst- und Kulturgeschichte; Bachstraße 5-953115 Bonn Germany