1. AXES, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium.
2. Conservation and Science Department, Ateliergebouw Rijksmuseum, Museumstraat 1, 1071 XX Amsterdam, Netherlands.
3. Paintings Conservation, Mauritshuis, Plein 29, 2511 CS The Hague, Netherlands.
4. Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, Netherlands.
5. National Gallery of Art, Constitution Avenue Northwest, Washington, DC 20565, USA.
6. Conservation Studies, University of Antwerp, Blindestraat 9, B-2000 Antwerp, Belgium.