1. Department of Dermatology and Venereology - Münster University Hospital; Germany
2. Department of Dermatology; University Hospital of Mainz; Germany
3. Department of Dermatology, Venereology and Allergology; Johann Wolfgang Goethe University Hospital; Frankfurt Germany
4. Elmshorn Dermatology Practice; Peterstraße 19, 25335 Elmshorn; Germany
5. Dermatology Practice, Tesdorpfstraße 17; 20148 Hamburg Germany
6. Robert Koch Apotheke, Fauviller Ring 1; 53501 Grafschaft-Ringen Germany
7. Division of Evidence based Medicine (dEBM); Department of Dermatology, Venereology and Allergology; Charité -Universitätsmedizin Berlin; Germany
8. Division of Tropical Medicine and Infectious Diseases; University Medical Center Hamburg-Eppendorf; Hamburg Germany
9. ifi-Institut für Interdisziplinäre Medizin; Lohmühlenstrasse 5 20099 Hamburg Germany