1. Deutsches Bergbau-Museum Bochum (German Mining Museum), Bochum, Germany
2. Freelance Object Conservator, Munich, Germany
3. Getty Conservation Institute, Los Angeles, CA, USA
4. Freelance Paper Conservator, Paris, France
5. Rathgen-Forschungslabor, Staatliche Museen zu Berlin, Berlin, Germany
6. UMR 7209, Archéozoologie & Archéobotanique: Sociétés, Pratiques et Environnements, Muséum National d’Histoire Naturelle, Paris, France
7. GPAC, Built Heritage Research Group, Faculty of Arts, University of the Basque Country UPV/EHU, Micaela Portilla Research Center, Vitoria-Gasteiz, Spain