1. Department of Dermatology; Université Libre de Bruxelles; Hôpital Erasme Brussels Belgium
2. Department of Dermatology; University of Modena; Modena Italy
3. Department of Dermatology; University of Barcelona; Barcelona Spain
4. Department of Dermatology; University of Graz; Graz Austria
5. Department of Dermatology; Health Sciences Faculty; Roskilde Hospital; University of Copenhagen; Roskilde Denmark