1. Department of Allergology and Occupational Dermatology; Dermatologikum Hamburg; Hamburg Germany
2. Federal Institute for Drugs and Medical Devices (BfArM); Bonn Germany
3. Department of Dermatology, Venereology and Allergology; St. Josef-Hospital; Ruhr-University Bochum; Bochum Germany
4. Department of Dermatology, Venereology and Allergology; University of Leipzig; Leipzig Germany
5. Department of Dermatology and Allergology; Ludwig Maximilians University; Munich Germany
6. Department of Dermatology; University Hospital of Erlangen; Erlangen Germany
7. Department of Dermatology; Saarland University Medical School; Homburg/Saar Germany
8. Department of Dermatology; SLK-Kliniken; Heilbronn Germany
9. Department of Occupational Dermatology; Berufsgenossenschaftliche-Klinik Falkenstein; Falkenstein Germany
10. Information Network of Departments of Dermatology; University of Göttingen; Göttingen Germany