1. Center for Scientific Studies in the Arts; Northwestern University; 2145 Sheridan Road, Tech K111 Evanston IL 60208 USA
2. Phoebe A. Hearst Museum of Anthropology; University of California; Berkeley CA 94720 USA
3. Getty Conservation Institute; 1200 Getty Center Drive, Suite 700 Los Angeles CA 90049 USA
4. Art Institute of Chicago; 111 S. Michigan Ave Chicago IL 60603 USA
5. Sorbonne Universités, Centre de Recherche sur la Conservation (CRC, USR 3224), Muséum National d'Histoire Naturelle, Ministère de la Culture et de la Communication, CNRS; Paris France
6. CNR Institute of Molecular Science and Technologies (CNR-ISTM); Via Elce di Sotto 8 06123 Perugia Italy
7. SMAArt centre / Department of Chemistry, Biology and Biotechnologies; University of Perugia; 06123 Perugia Italy
8. University of Antwerp; Groenenborgerlaan 171 2020 Antwerp Belgium
9. Department of Scientific Research; British Museum; Great Russell Street London WC1B 3DG UK