1. Globe Institute, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen, Denmark.
2. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Veˇna Pot 113, 1000 Ljubljana, Slovenia.
3. Royal Danish Academy, Conservation, Philip De Langes Allé 10, 3.15, 1435 Copenhagen, Denmark.
4. National Gallery of Denmark, Sølvgade 48-50, 1307 Copenhagen, Denmark.
5. Proteomics Program, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
6. Section for Clinical Mass Spectrometry, Danish Center for Neonatal Screening, Department of Congenital Disorders, Statens Serum Institut, Artillerivej 5, 2300 Copenhagen, Denmark.
7. Centre for Art Technological Studies and Conservation, National Gallery of Denmark, Sølvgade 48-50, 1307 Copenhagen, Denmark.
8. Wadum Art Technological Studies, Åløkkevej 24, 2720 Vanløse, Denmark.
9. Nivaagaard Collection, Gammel Strandvej 2, 2990 Nivå, Denmark.