1 Department of Dermatology, Allergology, and Venereology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; "Tattoo" Consultation, Department of Dermatology, Bichat-Claude Bernard Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France; European Academy of Dermatology and Venereology Task Force on Tattoos and Body Art, Lugano, Switzerland. Electronic address: [email protected].