1. Department of Dermatology and Allergology; Philipps-Universität Marburg
2. Department of Dermatology; University Hospital Erlangen; Erlangen Germany
3. Helios Hospital Wuppertal; Department of Dermatology, Allergology and Dermatosurgery; Wuppertal Germany
4. Department of Dermatology and Venereology; University of Cologne
5. Department of Dermatology; Medical Center, University of Freiburg; Germany
6. Dermatologist in Private Practice; Fulda Germany
7. Department of Dermatology and Allergology; University Hospital Ulm; Germany
8. Pediatric Immunology and Rheumatology; University Hospital and Outpatient Clinic for Pediatrics; Leipzig Germany
9. Department of Dermatology; Allergology; and Venereology; Campus Luebeck; University Hospital Schleswig-Holstein (UKSH); Luebeck Germany
10. Department of Dermatology; Venereology; and Allergology; University Hospital Wuerzburg; Wuerzburg Germany
11. Division of Evidence-based Medicine (dEBM); Department of Dermatology; Charité - University Hospital Berlin; Germany
12. Shire Deutschland GmbH; Berlin Germany
13. Department of Dermatology and Venereology; University Hospital Munich (LMU); Munich Germany
14. Allergy Center; Department of Dermatology; Charité - University Hospital Berlin; Germany