1. Department of Dermatology, Venereology, Allergology Helsinki University Central Hospital Helsinki Finland
2. "Tattoo" Consultation, Department of Dermatology, Bichat‐Claude Bernard Hospital Assistance Publique‐Hôpitaux de Paris Paris Cedex 18 France
3. La Roche‐Posay Laboratoire Dermatologique Levallois‐Perret France
4. FIMARAD, Hopital Necker Enfants Malades Paris France
5. European Market Maintenance Assessment Fontenay sous Bois France