1. Department of Dermatology, The “Tattoo Clinic”Bispebjerg University Hospital Copenhagen Denmark
2. Department of Chemical and Product SafetyGerman Federal Institute for Risk Assessment (BfR) Berlin Germany
3. Department of Plastic and Reconstructive SurgeryHerlev University Hospital Herlev Denmark
4. The European Synchrotron (ESRF) Grenoble Cedex 9 France
5. Xploraytion GmbH Berlin Germany
6. Institute for Optics and Atomic PhysicsTechnische Universität Berlin Berlin Germany