1. Department of Dermatology; University of Parma; Parma Italy
2. Department of Dermatology; University of Rouen, INSERM U 905; Rouen France
3. Department of Dermatology; University Medical Centre Groningen; Groningen The Netherlands
4. Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata, IRCCS; Rome Italy
5. Department of Dermatology; University of Lübeck; Lübeck Germany
6. Department of Dermatology; Aristotle University of Thessaloniki; Thessaloniki Greece
7. Department of Dermatology; Medical University of Warsaw; Warsaw Poland
8. Department of Dermatology; Masaryk University; Brno Czech Republic
9. Department of Dermatology; Semmelweis University; Budapest Hungary
10. Department of Dermatology and Venereology; University Hospital Center Zagreb; University of Zagreb School of Medicine; Zagreb Croatia
11. Department of Dermatology; Tel-Aviv University; Tel-Aviv Israel
12. Department of Dermatology; Akdeniz University; Antalya Turkey
13. Department of Dermatology; Karadeniz Technical University; Trabzon Turkey
14. Department of Dermatology; Philipps-University Marburg; Marburg Germany
15. Department of Dermatology; University Hospital of Bern - Inselspital, Freiburgstrasse 4; 3010 Bern Switzerland