1. Information Network of Departments of Dermatology (IVDK); Institute at Göttingen University Medical Center; Göttingen Germany
2. Department of Dermatology; University Allergy Center; Carl Gustav Carus University Medical Center; Dresden Technical University; Dresden Germany
3. Department of Dermatology; Mainz University Medical Center; Mainz Germany
4. Department of Dermatology; Münster University Medical Center; Münster Germany
5. Pullach
6. Department of Dermatology; Venereology; and Allergology; Ruhr University Medical Center; Bochum Germany
7. Department of Dermatology; Allergology and Dermatosurgery; HELIOS Medical Center of Witten/Herdecke University; Wuppertal Germany
8. Department of Dermatology; Allergology und Venereology; Hannover Medical School; Hannover Germany
9. Department of Allergology; Paul Ehrlich Institute; Langen Germany
10. Department of Dermatology and Allergology; Ludwig Maximilians University; Munich Germany