1. Department of Pathology and Experimental Therapy Universitat de Barcelona Barcelona Spain
2. Department of Integral Adult Dentistry, Research Centre for Dental Sciences Universidad de La Frontera Temuco Chile
3. Center of Natural History University of Hamburg Hamburg Germany
4. Institut Català de Paleontologia Miquel Crusafont Universitat Autònoma de Barcelona Barcelona Spain
5. Department of Conservative Dentistry and Periodontology University Hospital Regensburg Regensburg Germany