Institution: | 1. Department of Dermatology, allergology and venereology, Helsinki University Central Hospital, Meilahdentie 2 P.O. Box 160, FI-00029 HUS, Finlande;2. Consultation « tatouages », service de dermatologie, hôpital Bichat–Claude Bernard, rue Henri-Huchard, 75877 Paris cedex 18, France |