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