1. «Tattoo» Consultation, Department of Dermatology, Bichat‐Claude Bernard Hospital Assistance Publique‐Hôpitaux de Paris Paris France
2. Department of Dermatology, Allergology and Venereology University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Bio Informatics/Statistics University of Paris Sud Orsay France
4. La Roche‐Posay Laboratoire Dermatologique Levallois‐Perret France
5. FIMARAD Hopital Necker Enfants Malades Paris France
6. European Market Maintenance Assessment Fontenay‐sous‐Bois France