1. Department of Dermatology Allergology and Venereology Skin and Allergies Hospital University of Helsinki and Helsinki University Central Hospital Meilahdentie 2 PO Box 160, 00029 Helsinki Finland
2. Department of Dermatology «Tattoo» Consultation Assistance Publique‐Hôpitaux de Paris Bichat‐Claude Bernard Hospital 46 rue Henri Huchard 75877 Paris Cedex 18 France
3. Department of Dermatology University Hospital of Brest Brest 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