1. Department of Dermatology and Allergology; Ludwig Maximilian University; Munich Germany
2. Department of Dermato-Venerology; Teaching Hospital Královské Vinohrady; Third Faculty of Medicine; Charles University in Prague; Prague Czech Republic
3. Department of Dermatology, Allergology and Venerology; University of Lübeck; Lübeck Germany
4. Lübeck Institute of Experimental Dermatology (LIED); University of Lübeck; Lübeck Germany